[#28] Client: Apply code optimizations

Signed-off-by: Pavel Gross <p.gross@yadro.com>

src/FrostFS.SDK.Client/CllientKey.cs

@@ -11,4 +11,8 @@ public class ClientKey(ECDsa key)
     internal ECDsa ECDsaKey { get; } = key;
 
     internal ByteString PublicKeyProto { get; } = ByteString.CopyFrom(key.PublicKey());
+
+    internal string PublicKey { get; } = key.PublicKey().ToString();
+
+    internal FrostFsOwner Owner { get; } = new FrostFsOwner(key.PublicKey().PublicKeyToAddress());
 }

src/FrostFS.SDK.Client/FrostFS.SDK.Client.csproj

@@ -14,6 +14,10 @@
   <PropertyGroup>
 	  <CodeAnalysisTreatWarningsAsErrors>true</CodeAnalysisTreatWarningsAsErrors>
   </PropertyGroup>
+  
+  <PropertyGroup>
+	<EnforceCodeStyleInBuild>true</EnforceCodeStyleInBuild>
+  </PropertyGroup>
 
   <ItemGroup>
     <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="8.0.0" />

src/FrostFS.SDK.Client/FrostFSClient.cs

@@ -4,12 +4,7 @@ using System.Net.Http;
 using System.Threading.Tasks;
 
 using Frostfs.V2.Ape;
-using Frostfs.V2.Apemanager;
 
-using FrostFS.Accounting;
-using FrostFS.Container;
-using FrostFS.Netmap;
-using FrostFS.Object;
 using FrostFS.SDK.Client.Interfaces;
 using FrostFS.SDK.Client.Services;
 using FrostFS.SDK.Cryptography;
@@ -21,32 +16,40 @@ using Grpc.Net.Client;
 
 using Microsoft.Extensions.Options;
 
+using static Frostfs.V2.Apemanager.APEManagerService;
+using static FrostFS.Accounting.AccountingService;
+using static FrostFS.Container.ContainerService;
+using static FrostFS.Netmap.NetmapService;
+using static FrostFS.Object.ObjectService;
+using static FrostFS.Session.SessionService;
+
 namespace FrostFS.SDK.Client;
 
 public class FrostFSClient : IFrostFSClient
 {
     private bool isDisposed;
 
-    internal ContainerService.ContainerServiceClient? ContainerServiceClient { get; set; }
+    internal ContainerServiceClient? ContainerServiceClient { get; set; }
+    internal ContainerServiceProvider? ContainerServiceProvider { get; set; }
 
-    internal NetmapService.NetmapServiceClient? NetmapServiceClient { get; set; }
+    internal NetmapServiceClient? NetmapServiceClient { get; set; }
+    internal NetmapServiceProvider? NetmapServiceProvider { get; set; }
 
-    internal APEManagerService.APEManagerServiceClient? ApeManagerServiceClient { get; set; }
+    internal APEManagerServiceClient? ApeManagerServiceClient { get; set; }
+    internal ApeManagerServiceProvider? ApeManagerServiceProvider { get; set; }
 
-    internal SessionService.SessionServiceClient? SessionServiceClient { get; set; }
+    internal SessionServiceClient? SessionServiceClient { get; set; }
+    internal SessionServiceProvider? SessionServiceProvider { get; set; }
 
-    internal ObjectService.ObjectServiceClient? ObjectServiceClient { get; set; }
+    internal ObjectServiceClient? ObjectServiceClient { get; set; }
+    internal ObjectServiceProvider? ObjectServiceProvider { get; set; }
 
-    internal AccountingService.AccountingServiceClient? AccountingServiceClient { get; set; }
+    internal AccountingServiceClient? AccountingServiceClient { get; set; }
+    internal AccountingServiceProvider? AccountingServiceProvider { get; set; }
 
     internal ClientContext ClientCtx { get; set; }
 
-    public static IFrostFSClient GetInstance(IOptions<ClientSettings> clientOptions, GrpcChannelOptions? channelOptions = null)
-    {
-        return new FrostFSClient(clientOptions, channelOptions);
-    }
-
-    public static IFrostFSClient GetSingleOwnerInstance(IOptions<SingleOwnerClientSettings> clientOptions, GrpcChannelOptions? channelOptions = null)
+    public static IFrostFSClient GetSingleOwnerInstance(IOptions<ClientSettings> clientOptions, GrpcChannelOptions? channelOptions = null)
     {
         return new FrostFSClient(clientOptions, channelOptions);
     }
@@ -62,28 +65,28 @@ public class FrostFSClient : IFrostFSClient
     /// <param name="objectService">Object.ObjectService.ObjectServiceClient implementation</param>
     /// <returns></returns>
     public static IFrostFSClient GetTestInstance(
-        IOptions<SingleOwnerClientSettings> clientOptions,
+        IOptions<ClientSettings> settings,
         GrpcChannelOptions? channelOptions,
-        NetmapService.NetmapServiceClient netmapService,
-        SessionService.SessionServiceClient sessionService,
-        ContainerService.ContainerServiceClient containerService,
-        ObjectService.ObjectServiceClient objectService)
+        NetmapServiceClient netmapService,
+        SessionServiceClient sessionService,
+        ContainerServiceClient containerService,
+        ObjectServiceClient objectService)
     {
-        if (clientOptions is null)
+        if (settings is null)
         {
-            throw new ArgumentNullException(nameof(clientOptions));
+            throw new ArgumentNullException(nameof(settings));
         }
 
-        return new FrostFSClient(clientOptions, channelOptions, containerService, netmapService, sessionService, objectService);
+        return new FrostFSClient(settings, channelOptions, containerService, netmapService, sessionService, objectService);
     }
 
     private FrostFSClient(
-      IOptions<SingleOwnerClientSettings> settings,
+      IOptions<ClientSettings> settings,
       GrpcChannelOptions? channelOptions,
-      ContainerService.ContainerServiceClient containerService,
-      NetmapService.NetmapServiceClient netmapService,
-      SessionService.SessionServiceClient sessionService,
-      ObjectService.ObjectServiceClient objectService)
+      ContainerServiceClient containerService,
+      NetmapServiceClient netmapService,
+      SessionServiceClient sessionService,
+      ObjectServiceClient objectService)
     {
         if (settings is null)
         {
@@ -91,14 +94,18 @@ public class FrostFSClient : IFrostFSClient
         }
 
         var ecdsaKey = settings.Value.Key.LoadWif();
-        FrostFsOwner.FromKey(ecdsaKey);
 
         ClientCtx = new ClientContext(
            client: this,
-           key: ecdsaKey,
+           key: new ClientKey(ecdsaKey),
            owner: FrostFsOwner.FromKey(ecdsaKey),
            channel: InitGrpcChannel(settings.Value.Host, channelOptions),
-           version: new FrostFsVersion(2, 13));
+           version: new FrostFsVersion(2, 13))
+        {
+            SessionCache = new SessionCache(0),
+            Callback = settings.Value.Callback,
+            Interceptors = settings.Value.Interceptors
+        };
 
         ContainerServiceClient = containerService ?? throw new ArgumentNullException(nameof(containerService));
         NetmapServiceClient = netmapService ?? throw new ArgumentNullException(nameof(netmapService));
@@ -106,28 +113,9 @@ public class FrostFSClient : IFrostFSClient
         ObjectServiceClient = objectService ?? throw new ArgumentNullException(nameof(objectService));
     }
 
-    private FrostFSClient(IOptions<ClientSettings> options, GrpcChannelOptions? channelOptions)
+    private FrostFSClient(IOptions<ClientSettings> settings, GrpcChannelOptions? channelOptions)
     {
-        var clientSettings = (options?.Value) ?? throw new ArgumentNullException(nameof(options), "Options value must be initialized");
-
-        clientSettings.Validate();
-
-        var channel = InitGrpcChannel(clientSettings.Host, channelOptions);
-
-        ClientCtx = new ClientContext(
-            this,
-            key: null,
-            owner: null,
-            channel: channel,
-            version: new FrostFsVersion(2, 13));
-
-        // TODO: define timeout logic
-        // CheckFrostFsVersionSupport(new Context { Timeout = TimeSpan.FromSeconds(20) });
-    }
-
-    private FrostFSClient(IOptions<SingleOwnerClientSettings> options, GrpcChannelOptions? channelOptions)
-    {
-        var clientSettings = (options?.Value) ?? throw new ArgumentNullException(nameof(options), "Options value must be initialized");
+        var clientSettings = (settings?.Value) ?? throw new ArgumentNullException(nameof(settings), "Options value must be initialized");
 
         clientSettings.Validate();
 
@@ -137,10 +125,15 @@ public class FrostFSClient : IFrostFSClient
 
         ClientCtx = new ClientContext(
             this,
-            key: ecdsaKey,
+            key: new ClientKey(ecdsaKey),
             owner: FrostFsOwner.FromKey(ecdsaKey),
             channel: channel,
-            version: new FrostFsVersion(2, 13));
+            version: new FrostFsVersion(2, 13))
+        {
+            SessionCache = new SessionCache(0),
+            Callback = settings.Value.Callback,
+            Interceptors = settings.Value.Interceptors
+        };
 
         // TODO: define timeout logic
         // CheckFrostFsVersionSupport(new Context { Timeout = TimeSpan.FromSeconds(20) });
@@ -150,12 +143,14 @@ public class FrostFSClient : IFrostFSClient
     {
         ClientCtx = new ClientContext(
            client: this,
-           key: prm.Key,
+           key: new ClientKey(prm.Key),
            owner: FrostFsOwner.FromKey(prm.Key!),
            channel: InitGrpcChannel(prm.Address, null), //prm.GrpcChannelOptions),
            version: new FrostFsVersion(2, 13))
         {
-            SessionCache = cache
+            SessionCache = cache,
+            Interceptors = prm.Interceptors,
+            Callback = prm.Callback
         };
     }
 
@@ -175,14 +170,14 @@ public class FrostFSClient : IFrostFSClient
     }
 
     #region ApeManagerImplementation
-    public Task<byte[]> AddChainAsync(PrmApeChainAdd args)
+    public Task<ReadOnlyMemory<byte>> AddChainAsync(PrmApeChainAdd args)
     {
         if (args is null)
         {
             throw new ArgumentNullException(nameof(args));
         }
 
-        var service = GetApeManagerService(args);
+        var service = GetApeManagerService();
         return service.AddChainAsync(args);
     }
 
@@ -193,7 +188,7 @@ public class FrostFSClient : IFrostFSClient
             throw new ArgumentNullException(nameof(args));
         }
 
-        var service = GetApeManagerService(args);
+        var service = GetApeManagerService();
         return service.RemoveChainAsync(args);
     }
 
@@ -202,7 +197,7 @@ public class FrostFSClient : IFrostFSClient
         if (args is null)
             throw new ArgumentNullException(nameof(args));
 
-        var service = GetApeManagerService(args);
+        var service = GetApeManagerService();
         return service.ListChainAsync(args);
     }
     #endregion
@@ -213,14 +208,14 @@ public class FrostFSClient : IFrostFSClient
         if (args is null)
             throw new ArgumentNullException(nameof(args));
 
-        var service = GetContainerService(args);
+        var service = GetContainerService();
         return service.GetContainerAsync(args);
     }
 
     public IAsyncEnumerable<FrostFsContainerId> ListContainersAsync(PrmContainerGetAll? args = null)
     {
         args ??= new PrmContainerGetAll();
-        var service = GetContainerService(args);
+        var service = GetContainerService();
         return service.ListContainersAsync(args);
     }
 
@@ -229,7 +224,7 @@ public class FrostFSClient : IFrostFSClient
         if (args is null)
             throw new ArgumentNullException(nameof(args));
 
-        var service = GetContainerService(args);
+        var service = GetContainerService();
         return service.CreateContainerAsync(args);
     }
 
@@ -238,7 +233,7 @@ public class FrostFSClient : IFrostFSClient
         if (args is null)
             throw new ArgumentNullException(nameof(args));
 
-        var service = GetContainerService(args);
+        var service = GetContainerService();
         return service.DeleteContainerAsync(args);
     }
     #endregion
@@ -247,21 +242,21 @@ public class FrostFSClient : IFrostFSClient
     public Task<FrostFsNetmapSnapshot> GetNetmapSnapshotAsync(PrmNetmapSnapshot? args)
     {
         args ??= new PrmNetmapSnapshot();
-        var service = GetNetmapService(args);
+        var service = GetNetmapService();
         return service.GetNetmapSnapshotAsync(args);
     }
 
     public Task<FrostFsNodeInfo> GetNodeInfoAsync(PrmNodeInfo? args)
     {
         args ??= new PrmNodeInfo();
-        var service = GetNetmapService(args);
+        var service = GetNetmapService();
         return service.GetLocalNodeInfoAsync(args);
     }
 
     public Task<NetworkSettings> GetNetworkSettingsAsync(PrmNetworkSettings? args)
     {
         args ??= new PrmNetworkSettings();
-        var service = GetNetmapService(args);
+        var service = GetNetmapService();
         return service.GetNetworkSettingsAsync(args.Context!);
     }
     #endregion
@@ -272,7 +267,7 @@ public class FrostFSClient : IFrostFSClient
         if (args is null)
             throw new ArgumentNullException(nameof(args));
 
-        var service = GetObjectService(args);
+        var service = GetObjectService();
         return service.GetObjectHeadAsync(args);
     }
 
@@ -281,7 +276,7 @@ public class FrostFSClient : IFrostFSClient
         if (args is null)
             throw new ArgumentNullException(nameof(args));
 
-        var service = GetObjectService(args);
+        var service = GetObjectService();
         return service.GetObjectAsync(args);
     }
 
@@ -290,7 +285,7 @@ public class FrostFSClient : IFrostFSClient
         if (args is null)
             throw new ArgumentNullException(nameof(args));
 
-        var service = GetObjectService(args);
+        var service = GetObjectService();
         return service.GetRangeAsync(args);
     }
 
@@ -299,17 +294,16 @@ public class FrostFSClient : IFrostFSClient
         if (args is null)
             throw new ArgumentNullException(nameof(args));
 
-        var service = GetObjectService(args);
+        var service = GetObjectService();
         return service.GetRangeHashAsync(args);
     }
 
-
     public Task<FrostFsObjectId> PutObjectAsync(PrmObjectPut args)
     {
         if (args is null)
             throw new ArgumentNullException(nameof(args));
 
-        var service = GetObjectService(args);
+        var service = GetObjectService();
         return service.PutObjectAsync(args);
     }
 
@@ -318,7 +312,7 @@ public class FrostFSClient : IFrostFSClient
         if (args is null)
             throw new ArgumentNullException(nameof(args));
 
-        var service = GetObjectService(args);
+        var service = GetObjectService();
         return service.PutSingleObjectAsync(args);
     }
 
@@ -329,7 +323,7 @@ public class FrostFSClient : IFrostFSClient
             throw new ArgumentNullException(nameof(args));
         }
 
-        var service = GetObjectService(args);
+        var service = GetObjectService();
         return service.PatchObjectAsync(args);
     }
 
@@ -338,7 +332,7 @@ public class FrostFSClient : IFrostFSClient
         if (args is null)
             throw new ArgumentNullException(nameof(args));
 
-        var service = GetObjectService(args);
+        var service = GetObjectService();
         return service.DeleteObjectAsync(args);
     }
 
@@ -347,7 +341,7 @@ public class FrostFSClient : IFrostFSClient
         if (args is null)
             throw new ArgumentNullException(nameof(args));
 
-        var service = GetObjectService(args);
+        var service = GetObjectService();
         return service.SearchObjectsAsync(args);
     }
     #endregion
@@ -358,10 +352,9 @@ public class FrostFSClient : IFrostFSClient
         if (args is null)
             throw new ArgumentNullException(nameof(args));
 
-        var session = await CreateSessionInternalAsync(args).ConfigureAwait(false);
+        var token = await CreateSessionInternalAsync(args).ConfigureAwait(false);
 
-        var token = session.Serialize();
-        return new FrostFsSessionToken(token, session.Body.Id.ToUuid());
+        return new FrostFsSessionToken(token);
     }
 
     internal Task<SessionToken> CreateSessionInternalAsync(PrmSessionCreate args)
@@ -369,7 +362,7 @@ public class FrostFSClient : IFrostFSClient
         if (args is null)
             throw new ArgumentNullException(nameof(args));
 
-        var service = GetSessionService(args);
+        var service = GetSessionService();
         return service.CreateSessionAsync(args);
     }
     #endregion
@@ -379,18 +372,18 @@ public class FrostFSClient : IFrostFSClient
     {
         args ??= new PrmBalance();
 
-        var service = GetAccouningService(args);
+        var service = GetAccouningService();
         return await service.GetBallance(args).ConfigureAwait(false);
     }
     #endregion
 
     #region ToolsImplementation
-    public FrostFsObjectId CalculateObjectId(FrostFsObjectHeader header, CallContext ctx)
+    public FrostFsObjectId CalculateObjectId(FrostFsObjectHeader header)
     {
         if (header == null)
             throw new ArgumentNullException(nameof(header));
 
-        return ObjectTools.CalculateObjectId(header, ctx);
+        return ObjectTools.CalculateObjectId(header, this.ClientCtx);
     }
     #endregion
 
@@ -398,59 +391,34 @@ public class FrostFSClient : IFrostFSClient
     {
         var args = new PrmNodeInfo(ctx);
 
-        if (ctx?.Version == null)
-            throw new ArgumentNullException(nameof(ctx), "Version must be initialized");
-
-        var service = GetNetmapService(args);
+        var service = GetNetmapService();
         var localNodeInfo = await service.GetLocalNodeInfoAsync(args).ConfigureAwait(false);
 
-        if (!localNodeInfo.Version.IsSupported(ctx.Version))
+        if (!localNodeInfo.Version.IsSupported(ClientCtx.Version))
         {
             var msg = $"FrostFS {localNodeInfo.Version} is not supported.";
             throw new FrostFsException(msg);
         }
     }
 
-    private CallInvoker? SetupClientContext(IContext ctx)
+    private CallInvoker? CreateInvoker()
     {
         if (isDisposed)
             throw new FrostFsInvalidObjectException("Client is disposed.");
 
-        if (ctx.Context!.Key == null)
-        {
-            if (ClientCtx.Key == null)
-            {
-                throw new ArgumentNullException(nameof(ctx), "Key is not initialized.");
-            }
-
-            ctx.Context.Key = ClientCtx.Key.ECDsaKey;
-        }
-
-        if (ctx.Context.OwnerId == null)
-        {
-            ctx.Context.OwnerId = ClientCtx.Owner ?? FrostFsOwner.FromKey(ctx.Context.Key);
-        }
-
-        if (ctx.Context.Version == null)
-        {
-            if (ClientCtx.Version == null)
-            {
-                throw new ArgumentNullException(nameof(ctx), "Version is not initialized.");
-            }
-
-            ctx.Context.Version = ClientCtx.Version;
-        }
-
         CallInvoker? callInvoker = null;
 
-        foreach (var interceptor in ctx.Context.Interceptors)
-            callInvoker = AddInvoker(callInvoker, interceptor);
+        if (ClientCtx.Interceptors != null)
+        {
+            foreach (var interceptor in ClientCtx.Interceptors)
+                callInvoker = AddInvoker(callInvoker, interceptor);
+        }
 
-        if (ctx.Context.Callback != null)
-            callInvoker = AddInvoker(callInvoker, new MetricsInterceptor(ctx.Context.Callback));
+        if (ClientCtx.Callback != null)
+            callInvoker = AddInvoker(callInvoker, new MetricsInterceptor(ClientCtx.Callback));
 
-        if (ctx.Context.PoolErrorHandler != null)
-            callInvoker = AddInvoker(callInvoker, new ErrorInterceptor(ctx.Context.PoolErrorHandler));
+        if (ClientCtx.PoolErrorHandler != null)
+            callInvoker = AddInvoker(callInvoker, new ErrorInterceptor(ClientCtx.PoolErrorHandler));
 
         return callInvoker;
 
@@ -465,75 +433,109 @@ public class FrostFSClient : IFrostFSClient
         }
     }
 
-    private NetmapServiceProvider GetNetmapService(IContext ctx)
+    private NetmapServiceProvider GetNetmapService()
     {
-        var callInvoker = SetupClientContext(ctx);
-        var client = NetmapServiceClient ?? (callInvoker != null
-            ? new NetmapService.NetmapServiceClient(callInvoker)
-            : new NetmapService.NetmapServiceClient(ClientCtx.Channel));
+        if (NetmapServiceProvider == null)
+        {
+            var invoker = CreateInvoker();
 
-        return new NetmapServiceProvider(client, ClientCtx);
+            NetmapServiceClient = NetmapServiceClient ?? (
+                invoker != null
+                ? new NetmapServiceClient(invoker)
+                : new NetmapServiceClient(ClientCtx.Channel));
+
+            NetmapServiceProvider = new NetmapServiceProvider(NetmapServiceClient, ClientCtx);
+        }
+
+        return NetmapServiceProvider;
     }
 
-    private SessionServiceProvider GetSessionService(IContext ctx)
+    private SessionServiceProvider GetSessionService()
     {
-        var callInvoker = SetupClientContext(ctx);
-        var client = SessionServiceClient ?? (callInvoker != null
-            ? new SessionService.SessionServiceClient(callInvoker)
-            : new SessionService.SessionServiceClient(ClientCtx.Channel));
+        if (SessionServiceProvider == null)
+        {
+            var invoker = CreateInvoker();
+
+            SessionServiceClient = SessionServiceClient ?? (
+                invoker != null
+                ? new SessionServiceClient(invoker)
+                : new SessionServiceClient(ClientCtx.Channel));
+
+            SessionServiceProvider = new SessionServiceProvider(SessionServiceClient, ClientCtx);
+        }
+
+        return SessionServiceProvider;
 
-        return new SessionServiceProvider(client, ClientCtx);
     }
 
-    private ApeManagerServiceProvider GetApeManagerService(IContext ctx)
+    private ApeManagerServiceProvider GetApeManagerService()
     {
-        var callInvoker = SetupClientContext(ctx);
-        var client = ApeManagerServiceClient ?? (callInvoker != null
-            ? new APEManagerService.APEManagerServiceClient(callInvoker)
-            : new APEManagerService.APEManagerServiceClient(ClientCtx.Channel));
+        if (ApeManagerServiceProvider == null)
+        {
+            var invoker = CreateInvoker();
 
-        return new ApeManagerServiceProvider(client, ClientCtx);
+            ApeManagerServiceClient = ApeManagerServiceClient ?? (
+                invoker != null
+                ? new APEManagerServiceClient(invoker)
+                : new APEManagerServiceClient(ClientCtx.Channel));
+
+            ApeManagerServiceProvider = new ApeManagerServiceProvider(ApeManagerServiceClient, ClientCtx);
+        }
+
+        return ApeManagerServiceProvider;
     }
 
-    private AccountingServiceProvider GetAccouningService(IContext ctx)
+    private AccountingServiceProvider GetAccouningService()
     {
-        var callInvoker = SetupClientContext(ctx);
-        var client = AccountingServiceClient ?? (callInvoker != null
-            ? new AccountingService.AccountingServiceClient(callInvoker)
-            : new AccountingService.AccountingServiceClient(ClientCtx.Channel));
+        if (this.AccountingServiceProvider == null)
+        {
+            var invoker = CreateInvoker();
 
-        return new AccountingServiceProvider(client, ClientCtx);
+            AccountingServiceClient = AccountingServiceClient ?? (
+                invoker != null
+                ? new AccountingServiceClient(invoker)
+                : new AccountingServiceClient(ClientCtx.Channel));
+
+            AccountingServiceProvider = new AccountingServiceProvider(AccountingServiceClient, ClientCtx);
+        }
+
+        return AccountingServiceProvider;
     }
 
-    private ContainerServiceProvider GetContainerService(IContext ctx)
+    private ContainerServiceProvider GetContainerService()
     {
-        var callInvoker = SetupClientContext(ctx);
-        var client = ContainerServiceClient ?? (callInvoker != null
-            ? new ContainerService.ContainerServiceClient(callInvoker)
-            : new ContainerService.ContainerServiceClient(ClientCtx.Channel));
+        if (this.ContainerServiceProvider == null)
+        {
+            var invoker = CreateInvoker();
 
-        return new ContainerServiceProvider(client, ClientCtx);
+            ContainerServiceClient = ContainerServiceClient ?? (
+                invoker != null
+                ? new ContainerServiceClient(invoker)
+                : new ContainerServiceClient(ClientCtx.Channel));
+
+            ContainerServiceProvider = new ContainerServiceProvider(ContainerServiceClient, ClientCtx);
+        }
+
+        return ContainerServiceProvider;
     }
 
-    private ObjectServiceProvider GetObjectService(IContext ctx)
+    private ObjectServiceProvider GetObjectService()
     {
-        var callInvoker = SetupClientContext(ctx);
-        var client = ObjectServiceClient ?? (callInvoker != null
-            ? new ObjectService.ObjectServiceClient(callInvoker)
-            : new ObjectService.ObjectServiceClient(ClientCtx.Channel));
+        if (this.ObjectServiceProvider == null)
+        {
+            var invoker = CreateInvoker();
 
-        return new ObjectServiceProvider(client, ClientCtx);
+            ObjectServiceClient = ObjectServiceClient ?? (
+                invoker != null
+                ? new ObjectServiceClient(invoker)
+                : new ObjectServiceClient(ClientCtx.Channel));
+
+            ObjectServiceProvider = new ObjectServiceProvider(ObjectServiceClient, ClientCtx);
+        }
+
+        return ObjectServiceProvider;
     }
 
-    private AccountingServiceProvider GetAccountService(IContext ctx)
-    {
-        var callInvoker = SetupClientContext(ctx);
-        var client = AccountingServiceClient ?? (callInvoker != null
-            ? new AccountingService.AccountingServiceClient(callInvoker)
-            : new AccountingService.AccountingServiceClient(ClientCtx.Channel));
-
-        return new AccountingServiceProvider(client, ClientCtx);
-    }
 
     private static GrpcChannel InitGrpcChannel(string host, GrpcChannelOptions? channelOptions)
     {
@@ -559,7 +561,7 @@ public class FrostFSClient : IFrostFSClient
     {
         var prm = new PrmBalance(ctx);
 
-        var service = GetAccouningService(prm);
+        var service = GetAccouningService();
         _ = await service.GetBallance(prm).ConfigureAwait(false);
 
         return null;

src/FrostFS.SDK.Client/Interfaces/IFrostFSClient.cs

@@ -21,7 +21,7 @@ public interface IFrostFSClient : IDisposable
     #endregion
 
     #region ApeManager
-    Task<byte[]> AddChainAsync(PrmApeChainAdd args);
+    Task<ReadOnlyMemory<byte>> AddChainAsync(PrmApeChainAdd args);
 
     Task RemoveChainAsync(PrmApeChainRemove args);
 
@@ -63,7 +63,7 @@ public interface IFrostFSClient : IDisposable
     #endregion
 
     #region Tools
-    FrostFsObjectId CalculateObjectId(FrostFsObjectHeader header, CallContext ctx);
+    FrostFsObjectId CalculateObjectId(FrostFsObjectHeader header);
     #endregion
 
     public Task<string?> Dial(CallContext ctx);

src/FrostFS.SDK.Client/Mappers/ContainerId.cs

@@ -43,6 +43,6 @@ public static class ContainerIdMapper
             throw new ArgumentNullException(nameof(message));
         }
 
-        return new FrostFsContainerId(Base58.Encode(message.Value.ToByteArray()));
+        return new FrostFsContainerId(Base58.Encode(message.Value.Span));
     }
 }

src/FrostFS.SDK.Client/Mappers/Netmap/NodeInfo.cs

@@ -39,7 +39,7 @@ public static class NodeInfoMapper
             state: state,
             addresses: [.. nodeInfo.Addresses],
             attributes: nodeInfo.Attributes.ToDictionary(n => n.Key, n => n.Value),
-            publicKey: nodeInfo.PublicKey.ToByteArray()
+            publicKey: nodeInfo.PublicKey.Memory
         );
     }
 }

src/FrostFS.SDK.Client/Mappers/Object/Object.cs

@@ -6,7 +6,7 @@ internal static class ObjectMapper
     {
         return new FrostFsObject(obj.Header.ToModel())
         {
-            ObjectId = FrostFsObjectId.FromHash(obj.ObjectId.Value.ToByteArray())
+            ObjectId = FrostFsObjectId.FromHash(obj.ObjectId.Value.Span)
         };
     }
 }

src/FrostFS.SDK.Client/Mappers/Object/ObjectHeaderMapper.cs

@@ -40,7 +40,7 @@ public static class ObjectHeaderMapper
         }
 
         var model = new FrostFsObjectHeader(
-            new FrostFsContainerId(Base58.Encode(header.ContainerId.Value.ToByteArray())),
+            new FrostFsContainerId(Base58.Encode(header.ContainerId.Value.Span)),
             objTypeName,
             header.Attributes.Select(attribute => attribute.ToModel()).ToArray(),
             split,

src/FrostFS.SDK.Client/Mappers/Object/ObjectId.cs

@@ -28,6 +28,6 @@ public static class ObjectIdMapper
             throw new ArgumentNullException(nameof(objectId));
         }
 
-        return FrostFsObjectId.FromHash(objectId.Value.ToByteArray());
+        return FrostFsObjectId.FromHash(objectId.Value.Span);
     }
 }

src/FrostFS.SDK.Client/Mappers/OwnerId.cs

@@ -44,7 +44,7 @@ public static class OwnerIdMapper
 
         if (!Caches.Owners.TryGetValue(message, out FrostFsOwner? model))
         {
-            model = new FrostFsOwner(Base58.Encode(message.Value.ToByteArray()));
+            model = new FrostFsOwner(Base58.Encode(message.Value.Span));
 
             Caches.Owners.Set(message, model, _oneHourExpiration);
         }

src/FrostFS.SDK.Client/Models/Client/ClientSettings.cs

@@ -3,6 +3,8 @@ using System.Collections.ObjectModel;
 using System.Globalization;
 using System.Text;
 
+using Grpc.Core.Interceptors;
+
 namespace FrostFS.SDK;
 
 public class ClientSettings
@@ -11,60 +13,25 @@ public class ClientSettings
 
     public string Host { get; set; } = string.Empty;
 
-    public virtual void Validate()
-    {
-        var errors = CheckFields();
-        if (errors != null)
-            ThrowSettingsException(errors);
-    }
-
-    protected Collection<string>? CheckFields()
-    {
-        if (string.IsNullOrWhiteSpace(Host))
-        {
-            var error = string.Format(CultureInfo.InvariantCulture, errorTemplate, nameof(Host));
-            return new Collection<string>([error]);
-        }
-
-        return null;
-    }
-
-    protected static void ThrowSettingsException(Collection<string> errors)
-    {
-        if (errors is null)
-        {
-            throw new ArgumentNullException(nameof(errors));
-        }
-
-        StringBuilder messages = new();
-
-        foreach (var error in errors)
-        {
-            messages.AppendLine(error);
-        }
-
-        throw new ArgumentException(messages.ToString());
-    }
-}
-
-public class SingleOwnerClientSettings : ClientSettings
-{
     public string Key { get; set; } = string.Empty;
 
-    public override void Validate()
-    {
-        var errors = CheckFields();
-        if (errors != null)
-            ThrowSettingsException(errors);
-    }
+    public Action<CallStatistics>? Callback { get; set; }
 
-    protected new Collection<string>? CheckFields()
+    public Collection<Interceptor> Interceptors { get; } = [];
+
+    public void Validate()
     {
-        Collection<string>? errors = base.CheckFields();
+        StringBuilder? errors = null;
+
+        if (string.IsNullOrWhiteSpace(Host))
+            (errors = new StringBuilder(128)).AppendLine(string.Format(CultureInfo.InvariantCulture, errorTemplate, nameof(Host)));
 
         if (string.IsNullOrWhiteSpace(Key))
-            (errors ??= []).Add(string.Format(CultureInfo.InvariantCulture, errorTemplate, nameof(Key)));
+            (errors ??= new StringBuilder(128)).AppendLine(string.Format(CultureInfo.InvariantCulture, errorTemplate, nameof(Key)));
 
-        return errors;
+        if (errors != null)
+        {
+            throw new ArgumentException(errors.ToString());
+        }
     }
 }

src/FrostFS.SDK.Client/Models/Containers/FrostFsContainerId.cs

@@ -27,7 +27,7 @@ public class FrostFsContainerId
 
         if (containerID != null)
         {
-            this.modelId = Base58.Encode(containerID.Value.ToByteArray());
+            this.modelId = Base58.Encode(containerID.Value.Span);
             return this.modelId;
         }
 

src/FrostFS.SDK.Client/Models/Containers/FrostFsContainerInfo.cs

@@ -96,7 +96,7 @@ public class FrostFsContainerInfo
                 PlacementPolicy = PlacementPolicy.Value.GetPolicy(),
                 Nonce = ByteString.CopyFrom(Nonce.ToBytes()),
                 OwnerId = Owner?.OwnerID,
-                Version = Version?.Version
+                Version = Version?.VersionID
             };
 
             var attribs = GetGrpsAttributes();

src/FrostFS.SDK.Client/Models/Netmap/FrostFsVersion.cs

@@ -10,7 +10,7 @@ public class FrostFsVersion(int major, int minor)
     public int Major { get; set; } = major;
     public int Minor { get; set; } = minor;
 
-    internal Version Version
+    internal Version VersionID
     {
         get
         {

src/FrostFS.SDK.Client/Models/Object/FrostFsObjectId.cs

@@ -8,13 +8,8 @@ public class FrostFsObjectId(string id)
 {
     public string Value { get; } = id;
 
-    public static FrostFsObjectId FromHash(byte[] hash)
+    public static FrostFsObjectId FromHash(ReadOnlySpan<byte> hash)
     {
-        if (hash is null)
-        {
-            throw new ArgumentNullException(nameof(hash));
-        }
-
         if (hash.Length != Constants.Sha256HashLength)
             throw new FormatException("ObjectID must be a sha256 hash.");
 

src/FrostFS.SDK.Client/Models/Object/FrostFsOwner.cs

@@ -4,6 +4,7 @@ using FrostFS.Refs;
 using FrostFS.SDK.Client.Mappers.GRPC;
 using FrostFS.SDK.Cryptography;
 
+
 namespace FrostFS.SDK;
 
 public class FrostFsOwner(string id)

src/FrostFS.SDK.Client/Models/Session/FrostFsSessionToken.cs

@@ -1,9 +1,117 @@
 using System;
 
+using FrostFS.Refs;
+
+using FrostFS.SDK.Client;
+using FrostFS.SDK.Cryptography;
+using FrostFS.Session;
+
+using Google.Protobuf;
+
 namespace FrostFS.SDK;
 
-public class FrostFsSessionToken(byte[] token, Guid id)
+public class FrostFsSessionToken
 {
-    public Guid Id { get; private set; } = id;
-    public byte[] Token { get; private set; } = token;
+    private Guid _id;
+    private ReadOnlyMemory<byte> _sessionKey;
+    private readonly SessionToken.Types.Body _body;
+
+    private FrostFsSessionToken()
+    {
+        ProtoId = ByteString.Empty;
+        ProtoSessionKey = ByteString.Empty;
+        _body = new SessionToken.Types.Body();
+    }
+
+    internal FrostFsSessionToken(SessionToken token)
+    {
+        ProtoId = token.Body.Id;
+        ProtoSessionKey = token.Body.SessionKey;
+
+        _body = token.Body;
+    }
+
+    public Guid Id
+    {
+        get
+        {
+            if (_id == Guid.Empty)
+                _id = ProtoId.ToUuid();
+
+            return _id;
+        }
+    }
+
+    public ReadOnlyMemory<byte> SessionKey
+    {
+        get
+        {
+            if (_sessionKey.IsEmpty)
+                _sessionKey = ProtoSessionKey.Memory;
+
+            return _sessionKey;
+        }
+    }
+
+    internal ByteString ProtoId { get; }
+
+    internal ByteString ProtoSessionKey { get; }
+
+    public SessionToken CreateContainerToken(ContainerID? containerId, ContainerSessionContext.Types.Verb verb, ClientKey key)
+    {
+        if (key is null)
+        {
+            throw new ArgumentNullException(nameof(key));
+        }
+
+        SessionToken sessionToken = new() { Body = _body.Clone() };
+
+        sessionToken.Body.Container = new() { Verb = verb };
+
+        if (containerId != null)
+            sessionToken.Body.Container.ContainerId = containerId;
+        else
+            sessionToken.Body.Container.Wildcard = true;
+
+        sessionToken.Body.SessionKey = key.PublicKeyProto;
+
+        sessionToken.Signature = key.ECDsaKey.SignMessagePart(sessionToken.Body);
+
+        return sessionToken;
+    }
+
+    public SessionToken CreateObjectTokenContext(Address address, ObjectSessionContext.Types.Verb verb, ClientKey key)
+    {
+        if (address is null)
+        {
+            throw new ArgumentNullException(nameof(address));
+        }
+
+        if (key is null)
+        {
+            throw new ArgumentNullException(nameof(key));
+        }
+
+        SessionToken sessionToken = new()
+        {
+            Body = _body.Clone()
+        };
+
+        ObjectSessionContext.Types.Target target = new() { Container = address.ContainerId };
+
+        if (address.ObjectId != null)
+            target.Objects.Add(address.ObjectId);
+
+        sessionToken.Body.Object = new()
+        {
+            Target = target,
+            Verb = verb
+        };
+
+        sessionToken.Body.SessionKey = key.PublicKeyProto;
+
+        sessionToken.Signature = key.ECDsaKey.SignMessagePart(sessionToken.Body);
+
+        return sessionToken;
+    }
 }

src/FrostFS.SDK.Client/Parameters/CallContext.cs

@@ -1,27 +1,16 @@
 using System;
-using System.Collections.ObjectModel;
-using System.Security.Cryptography;
 using System.Threading;
 
-using FrostFS.SDK.Cryptography;
-
-using Google.Protobuf;
-
-using Grpc.Core.Interceptors;
-
 namespace FrostFS.SDK.Client;
 
 public class CallContext()
 {
-    private ByteString? publicKeyCache;
 
-    internal Action<Exception>? PoolErrorHandler { get; set; }
+    //    internal Action<Exception>? PoolErrorHandler { get; set; }
 
-    public ECDsa? Key { get; set; }
+    //    public FrostFsOwner? OwnerId { get; set; }
 
-    public FrostFsOwner? OwnerId { get; set; }
-
-    public FrostFsVersion? Version { get; set; }
+    //   public FrostFsVersion? Version { get; set; }
 
     public CancellationToken CancellationToken { get; set; }
 
@@ -29,17 +18,7 @@ public class CallContext()
 
     public DateTime? Deadline => Timeout.Ticks > 0 ? DateTime.UtcNow.Add(Timeout) : null;
 
-    public Action<CallStatistics>? Callback { get; set; }
+    //    public Action<CallStatistics>? Callback { get; set; }
 
-    public Collection<Interceptor> Interceptors { get; } = [];
-
-    public ByteString? GetPublicKeyCache()
-    {
-        if (publicKeyCache == null && Key != null)
-        {
-            publicKeyCache = ByteString.CopyFrom(Key.PublicKey());
-        }
-
-        return publicKeyCache;
-    }
+    //  public Collection<Interceptor> Interceptors { get; } = [];
 }

src/FrostFS.SDK.Client/Pool/ClientWrapper.cs

@@ -9,10 +9,8 @@ namespace FrostFS.SDK.Client;
 public class ClientWrapper : ClientStatusMonitor
 {
     private readonly object _lock = new();
-
     private SessionCache sessionCache;
 
-
     internal ClientWrapper(WrapperPrm wrapperPrm, Pool pool) : base(wrapperPrm.Logger, wrapperPrm.Address)
     {
         WrapperPrm = wrapperPrm;
@@ -140,6 +138,7 @@ public class ClientWrapper : ClientStatusMonitor
         catch (FrostFsException)
         {
             SetUnhealthy();
+            
             return wasHealthy;
         }
 

src/FrostFS.SDK.Client/Pool/InitParameters.cs

@@ -1,6 +1,8 @@
 using System;
+using System.Collections.ObjectModel;
 using System.Security.Cryptography;
 
+using Grpc.Core.Interceptors;
 using Grpc.Net.Client;
 
 using Microsoft.Extensions.Logging;
@@ -33,4 +35,8 @@ public class InitParameters
     public ulong GracefulCloseOnSwitchTimeout { get; set; }
 
     public ILogger? Logger { get; set; }
+
+    public Action<CallStatistics>? Callback { get; set; }
+
+    public Collection<Interceptor> Interceptors { get; } = [];
 }

src/FrostFS.SDK.Client/Pool/Pool.cs

@@ -35,18 +35,17 @@ public partial class Pool : IFrostFSClient
 
     private InnerPool[]? InnerPools { get; set; }
 
-    private ECDsa Key { get; set; }
-
-    private string PublicKey { get; }
+    private ClientKey Key { get; set; }
 
     private OwnerID? _ownerId;
+
     private FrostFsOwner? _owner;
 
     private FrostFsOwner Owner
     {
         get
         {
-            _owner ??= new FrostFsOwner(Key.PublicKey().PublicKeyToAddress());
+            _owner ??= new FrostFsOwner(Key.ECDsaKey.PublicKey().PublicKeyToAddress());
             return _owner;
         }
     }
@@ -57,7 +56,7 @@ public partial class Pool : IFrostFSClient
         {
             if (_ownerId == null)
             {
-                _owner = new FrostFsOwner(Key.PublicKey().PublicKeyToAddress());
+                _owner = Key.Owner;
                 _ownerId = _owner.ToMessage();
             }
             return _ownerId;
@@ -101,8 +100,7 @@ public partial class Pool : IFrostFSClient
 
         FillDefaultInitParams(options, this);
 
-        Key = options.Key;
-        PublicKey = $"{Key.PublicKey()}";
+        Key = new ClientKey(options.Key);
 
         SessionCache = cache;
         logger = options.Logger;
@@ -115,16 +113,9 @@ public partial class Pool : IFrostFSClient
             options.SessionExpirationDuration);
 
         ClientBuilder = options.ClientBuilder!;
-    }
 
-    private void SetupContext(CallContext ctx)
-    {
-        if (ctx == null)
-        {
-            throw new ArgumentNullException(nameof(ctx));
-        }
+        // ClientContext.PoolErrorHandler = client.HandleError;
 
-        ctx.Key ??= Key;
     }
 
     // Dial establishes a connection to the servers from the FrostFS network.
@@ -137,8 +128,6 @@ public partial class Pool : IFrostFSClient
     // See also InitParameters.SetClientRebalanceInterval.
     public async Task<string?> Dial(CallContext ctx)
     {
-        SetupContext(ctx);
-
         var inner = new InnerPool[RebalanceParams.NodesParams.Length];
 
         bool atLeastOneHealthy = false;
@@ -158,11 +147,11 @@ public partial class Pool : IFrostFSClient
                     await client.Dial(ctx).ConfigureAwait(false);
                     dialed = true;
 
-                    var token = await InitSessionForDuration(ctx, client, RebalanceParams.SessionExpirationDuration, Key, false)
+                    var token = await InitSessionForDuration(ctx, client, RebalanceParams.SessionExpirationDuration, Key.ECDsaKey, false)
                         .ConfigureAwait(false);
 
-                    var key = FormCacheKey(nodeParams.Addresses[j], Key.PrivateKey().ToString());
-                    _ = SessionCache.Cache[key] = token;
+                    var key = FormCacheKey(nodeParams.Addresses[j], Key.PublicKey);
+                    SessionCache.SetValue(key, token);
 
                     atLeastOneHealthy = true;
                 }
@@ -291,12 +280,14 @@ public partial class Pool : IFrostFSClient
                 var wrapperPrm = new WrapperPrm
                 {
                     Address = address,
-                    Key = parameters.Key,
+                    Key = parameters.Key!,
                     Logger = parameters.Logger,
                     DialTimeout = parameters.NodeDialTimeout,
                     StreamTimeout = parameters.NodeStreamTimeout,
                     ErrorThreshold = parameters.ErrorThreshold,
-                    GracefulCloseOnSwitchTimeout = parameters.GracefulCloseOnSwitchTimeout
+                    GracefulCloseOnSwitchTimeout = parameters.GracefulCloseOnSwitchTimeout,
+                    Callback = parameters.Callback,
+                    Interceptors = parameters.Interceptors
                 };
 
                 return new ClientWrapper(wrapperPrm, pool);
@@ -318,7 +309,7 @@ public partial class Pool : IFrostFSClient
         throw new FrostFsException("Cannot find alive client");
     }
 
-    private static async Task<FrostFsSessionToken?> InitSessionForDuration(CallContext ctx, ClientWrapper cw, ulong duration, ECDsa key, bool clientCut)
+    private static async Task<FrostFsSessionToken> InitSessionForDuration(CallContext ctx, ClientWrapper cw, ulong duration, ECDsa key, bool clientCut)
     {
         var client = cw.Client;
         var networkInfo = await client!.GetNetworkSettingsAsync(new PrmNetworkSettings(ctx)).ConfigureAwait(false);
@@ -521,7 +512,6 @@ public partial class Pool : IFrostFSClient
         var client = Connection();
 
         args ??= new();
-        args.Context.PoolErrorHandler = client.HandleError;
 
         return await client.Client!.GetNetmapSnapshotAsync(args).ConfigureAwait(false);
     }
@@ -529,278 +519,126 @@ public partial class Pool : IFrostFSClient
     public async Task<FrostFsNodeInfo> GetNodeInfoAsync(PrmNodeInfo? args = null)
     {
         var client = Connection();
-
-        args ??= new();
-        args.Context.PoolErrorHandler = client.HandleError;
-
         return await client.Client!.GetNodeInfoAsync(args).ConfigureAwait(false);
     }
 
     public async Task<NetworkSettings> GetNetworkSettingsAsync(PrmNetworkSettings? args = null)
     {
         var client = Connection();
-
-        args ??= new();
-        args.Context.PoolErrorHandler = client.HandleError;
-
         return await client.Client!.GetNetworkSettingsAsync(args).ConfigureAwait(false);
     }
 
     public async Task<FrostFsSessionToken> CreateSessionAsync(PrmSessionCreate args)
     {
-        if (args is null)
-        {
-            throw new ArgumentNullException(nameof(args));
-        }
-
         var client = Connection();
-
-        args.Context.PoolErrorHandler = client.HandleError;
-
         return await client.Client!.CreateSessionAsync(args).ConfigureAwait(false);
     }
 
-    public async Task<byte[]> AddChainAsync(PrmApeChainAdd args)
+    public async Task<ReadOnlyMemory<byte>> AddChainAsync(PrmApeChainAdd args)
     {
-        if (args is null)
-        {
-            throw new ArgumentNullException(nameof(args));
-        }
-
         var client = Connection();
-
-        args.Context.PoolErrorHandler = client.HandleError;
-
         return await client.Client!.AddChainAsync(args).ConfigureAwait(false);
     }
 
     public async Task RemoveChainAsync(PrmApeChainRemove args)
     {
-        if (args is null)
-        {
-            throw new ArgumentNullException(nameof(args));
-        }
-
         var client = Connection();
-
-        args.Context.PoolErrorHandler = client.HandleError;
-
         await client.Client!.RemoveChainAsync(args).ConfigureAwait(false);
     }
 
     public async Task<Chain[]> ListChainAsync(PrmApeChainList args)
     {
-        if (args is null)
-        {
-            throw new ArgumentNullException(nameof(args));
-        }
-
         var client = Connection();
-
-        args.Context.PoolErrorHandler = client.HandleError;
-
         return await client.Client!.ListChainAsync(args).ConfigureAwait(false);
     }
 
     public async Task<FrostFsContainerInfo> GetContainerAsync(PrmContainerGet args)
     {
-        if (args is null)
-        {
-            throw new ArgumentNullException(nameof(args));
-        }
-
         var client = Connection();
-
-        args.Context.PoolErrorHandler = client.HandleError;
-
         return await client.Client!.GetContainerAsync(args).ConfigureAwait(false);
     }
 
     public IAsyncEnumerable<FrostFsContainerId> ListContainersAsync(PrmContainerGetAll? args = null)
     {
         var client = Connection();
-
-        args ??= new();
-        args.Context.PoolErrorHandler = client.HandleError;
-
         return client.Client!.ListContainersAsync(args);
     }
 
     public async Task<FrostFsContainerId> CreateContainerAsync(PrmContainerCreate args)
     {
-        if (args is null)
-        {
-            throw new ArgumentNullException(nameof(args));
-        }
-
         var client = Connection();
-
-        args.Context.PoolErrorHandler = client.HandleError;
-
         return await client.Client!.CreateContainerAsync(args).ConfigureAwait(false);
     }
 
     public async Task DeleteContainerAsync(PrmContainerDelete args)
     {
-        if (args is null)
-        {
-            throw new ArgumentNullException(nameof(args));
-        }
-
         var client = Connection();
-
-        args.Context.PoolErrorHandler = client.HandleError;
-
         await client.Client!.DeleteContainerAsync(args).ConfigureAwait(false);
     }
 
     public async Task<FrostFsObjectHeader> GetObjectHeadAsync(PrmObjectHeadGet args)
     {
-        if (args is null)
-        {
-            throw new ArgumentNullException(nameof(args));
-        }
-
         var client = Connection();
-
-        args.Context.PoolErrorHandler = client.HandleError;
-
         return await client.Client!.GetObjectHeadAsync(args).ConfigureAwait(false);
     }
 
     public async Task<FrostFsObject> GetObjectAsync(PrmObjectGet args)
     {
-        if (args is null)
-        {
-            throw new ArgumentNullException(nameof(args));
-        }
-
         var client = Connection();
-
-        args.Context.PoolErrorHandler = client.HandleError;
-
         return await client.Client!.GetObjectAsync(args).ConfigureAwait(false);
     }
 
     public async Task<FrostFsObjectId> PutObjectAsync(PrmObjectPut args)
     {
-        if (args is null)
-        {
-            throw new ArgumentNullException(nameof(args));
-        }
-
         var client = Connection();
-
-        args.Context.PoolErrorHandler = client.HandleError;
-
         return await client.Client!.PutObjectAsync(args).ConfigureAwait(false);
     }
 
     public async Task<FrostFsObjectId> PutSingleObjectAsync(PrmSingleObjectPut args)
     {
-        if (args is null)
-        {
-            throw new ArgumentNullException(nameof(args));
-        }
-
         var client = Connection();
-
-        args.Context.PoolErrorHandler = client.HandleError;
-
         return await client.Client!.PutSingleObjectAsync(args).ConfigureAwait(false);
     }
 
     public async Task<FrostFsObjectId> PatchObjectAsync(PrmObjectPatch args)
     {
-        if (args is null)
-        {
-            throw new ArgumentNullException(nameof(args));
-        }
-
         var client = Connection();
-
-        args.Context.PoolErrorHandler = client.HandleError;
-
         return await client.Client!.PatchObjectAsync(args).ConfigureAwait(false);
     }
 
     public async Task<RangeReader> GetRangeAsync(PrmRangeGet args)
     {
-        if (args is null)
-        {
-            throw new ArgumentNullException(nameof(args));
-        }
-
         var client = Connection();
-
-        args.Context.PoolErrorHandler = client.HandleError;
-
         return await client.Client!.GetRangeAsync(args).ConfigureAwait(false);
     }
 
     public async Task<ReadOnlyMemory<byte>[]> GetRangeHashAsync(PrmRangeHashGet args)
     {
-        if (args is null)
-        {
-            throw new ArgumentNullException(nameof(args));
-        }
-
         var client = Connection();
-
-        args.Context.PoolErrorHandler = client.HandleError;
-
         return await client.Client!.GetRangeHashAsync(args).ConfigureAwait(false);
     }
 
     public async Task<FrostFsObjectId> PatchAsync(PrmObjectPatch args)
     {
-        if (args is null)
-        {
-            throw new ArgumentNullException(nameof(args));
-        }
-
         var client = Connection();
-
-        args.Context.PoolErrorHandler = client.HandleError;
-
         return await client.Client!.PatchObjectAsync(args).ConfigureAwait(false);
     }
 
     public async Task DeleteObjectAsync(PrmObjectDelete args)
     {
-        if (args is null)
-        {
-            throw new ArgumentNullException(nameof(args));
-        }
-
         var client = Connection();
-
-        args.Context.PoolErrorHandler = client.HandleError;
-
         await client.Client!.DeleteObjectAsync(args).ConfigureAwait(false);
     }
 
     public IAsyncEnumerable<FrostFsObjectId> SearchObjectsAsync(PrmObjectSearch args)
     {
-        if (args is null)
-        {
-            throw new ArgumentNullException(nameof(args));
-        }
-
         var client = Connection();
-
-        args.Context.PoolErrorHandler = client.HandleError;
-
         return client.Client!.SearchObjectsAsync(args);
     }
 
     public async Task<Accounting.Decimal> GetBalanceAsync(PrmBalance? args)
     {
         var client = Connection();
-
-        args ??= new();
-        args.Context.PoolErrorHandler = client.HandleError;
-
         return await client.Client!.GetBalanceAsync(args).ConfigureAwait(false);
     }
 
@@ -824,7 +662,7 @@ public partial class Pool : IFrostFSClient
         GC.SuppressFinalize(this);
     }
 
-    public FrostFsObjectId CalculateObjectId(FrostFsObjectHeader header, CallContext ctx)
+    public FrostFsObjectId CalculateObjectId(FrostFsObjectHeader header)
     {
         throw new NotImplementedException();
     }

src/FrostFS.SDK.Client/Pool/SessionCache.cs

@@ -1,23 +1,49 @@
 using System;
-using System.Collections;
+using System.Collections.Concurrent;
 
 namespace FrostFS.SDK.Client;
 
-internal struct SessionCache(ulong sessionExpirationDuration)
+internal sealed class SessionCache(ulong sessionExpirationDuration)
 {
-    internal Hashtable Cache { get; } = [];
+    private ConcurrentDictionary<string, FrostFsSessionToken> _cache { get; } = [];
 
     internal ulong CurrentEpoch { get; set; }
 
     internal ulong TokenDuration { get; set; } = sessionExpirationDuration;
 
+    internal bool Contains(string key)
+    {
+        return _cache.ContainsKey(key);
+    }
+
+    internal bool TryGetValue(string? key, out FrostFsSessionToken? value)
+    {
+        if (key == null)
+        {
+            value = null;
+            return false;
+        }
+
+        var ok = _cache.TryGetValue(key, out value);
+
+        return ok && value != null;
+    }
+
+    internal void SetValue(string? key, FrostFsSessionToken value)
+    {
+        if (key != null)
+        {
+            _cache[key] = value;
+        }
+    }
+
     internal void DeleteByPrefix(string prefix)
     {
-        foreach (var key in Cache.Keys)
+        foreach (var key in _cache.Keys)
         {
-            if (((string)key).StartsWith(prefix, StringComparison.Ordinal))
+            if (key.StartsWith(prefix, StringComparison.Ordinal))
             {
-                Cache.Remove(key);
+                _cache.TryRemove(key, out var _);
             }
         }
     }

src/FrostFS.SDK.Client/Pool/WrapperPrm.cs

@@ -1,13 +1,14 @@
 using System;
+using System.Collections.ObjectModel;
 using System.Security.Cryptography;
 
+using Grpc.Core.Interceptors;
 using Grpc.Net.Client;
 
 using Microsoft.Extensions.Logging;
 
 namespace FrostFS.SDK.Client;
 
-// wrapperPrm is params to create clientWrapper.
 [System.Diagnostics.CodeAnalysis.SuppressMessage("Performance", "CA1815:Override equals and operator equals on value types", Justification = "<Pending>")]
 public struct WrapperPrm
 {
@@ -15,7 +16,7 @@ public struct WrapperPrm
 
     internal string Address { get; set; }
 
-    internal ECDsa? Key { get; set; }
+    internal ECDsa Key { get; set; }
 
     internal ulong DialTimeout { get; set; }
 
@@ -30,5 +31,9 @@ public struct WrapperPrm
     internal GrpcChannelOptions GrpcChannelOptions { get; set; }
 
     internal ulong GracefulCloseOnSwitchTimeout { get; set; }
+
+    internal Action<CallStatistics>? Callback { get; set; }
+
+    internal Collection<Interceptor>? Interceptors { get; set; }
 }
 

src/FrostFS.SDK.Client/Services/AccountingServiceProvider.cs

@@ -24,12 +24,12 @@ internal sealed class AccountingServiceProvider : ContextAccessor
         {
             Body = new()
             {
-                OwnerId = ctx.OwnerId!.OwnerID
+                OwnerId = ClientContext.Owner.OwnerID
             }
         };
 
         request.AddMetaHeader(args.XHeaders);
-        request.Sign(ctx.Key!);
+        request.Sign(ClientContext.Key.ECDsaKey);
 
         var response = await _accountingServiceClient!.BalanceAsync(request, null, ctx.Deadline, ctx.CancellationToken);
 

src/FrostFS.SDK.Client/Services/ApeManagerServiceProvider.cs

@@ -16,13 +16,9 @@ internal sealed class ApeManagerServiceProvider : ContextAccessor
         _apeManagerServiceClient = apeManagerServiceClient;
     }
 
-    internal async Task<byte[]> AddChainAsync(PrmApeChainAdd args)
+    internal async Task<ReadOnlyMemory<byte>> AddChainAsync(PrmApeChainAdd args)
     {
         var ctx = args.Context!;
-        ctx.Key ??= ClientContext.Key?.ECDsaKey;
-
-        if (ctx.Key == null)
-            throw new ArgumentNullException(nameof(args), "Key is null");
 
         AddChainRequest request = new()
         {
@@ -34,22 +30,18 @@ internal sealed class ApeManagerServiceProvider : ContextAccessor
         };
 
         request.AddMetaHeader(args.XHeaders);
-        request.Sign(ctx.Key);
+        request.Sign(ClientContext.Key.ECDsaKey);
 
         var response = await _apeManagerServiceClient!.AddChainAsync(request, null, ctx.Deadline, ctx.CancellationToken);
 
         Verifier.CheckResponse(response);
 
-        return response.Body.ChainId.ToByteArray();
+        return response.Body.ChainId.Memory;
     }
 
     internal async Task RemoveChainAsync(PrmApeChainRemove args)
     {
         var ctx = args.Context!;
-        ctx.Key ??= ClientContext.Key?.ECDsaKey;
-
-        if (ctx.Key == null)
-            throw new ArgumentNullException(nameof(args), "Key is null");
 
         RemoveChainRequest request = new()
         {
@@ -61,7 +53,7 @@ internal sealed class ApeManagerServiceProvider : ContextAccessor
         };
 
         request.AddMetaHeader(args.XHeaders);
-        request.Sign(ctx.Key);
+        request.Sign(ClientContext.Key.ECDsaKey);
 
         var response = await _apeManagerServiceClient!.RemoveChainAsync(request, null, ctx.Deadline, ctx.CancellationToken);
 
@@ -71,10 +63,6 @@ internal sealed class ApeManagerServiceProvider : ContextAccessor
     internal async Task<Chain[]> ListChainAsync(PrmApeChainList args)
     {
         var ctx = args.Context!;
-        ctx.Key ??= ClientContext.Key?.ECDsaKey;
-
-        if (ctx.Key == null)
-            throw new ArgumentNullException(nameof(args), "Key is null");
 
         ListChainsRequest request = new()
         {
@@ -85,7 +73,7 @@ internal sealed class ApeManagerServiceProvider : ContextAccessor
         };
 
         request.AddMetaHeader(args.XHeaders);
-        request.Sign(ctx.Key);
+        request.Sign(ClientContext.Key.ECDsaKey);
 
         var response = await _apeManagerServiceClient!.ListChainsAsync(request, null, ctx.Deadline, ctx.CancellationToken);
 

src/FrostFS.SDK.Client/Services/ContainerServiceProvider.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections.Generic;
 using System.Collections.Specialized;
+using System.Security.Cryptography;
 using System.Threading.Tasks;
 
 using FrostFS.Container;
@@ -12,26 +13,34 @@ using FrostFS.Session;
 
 namespace FrostFS.SDK.Client;
 
-internal sealed class ContainerServiceProvider(ContainerService.ContainerServiceClient service, ClientContext clientCtx) : ContextAccessor(clientCtx), ISessionProvider
+internal sealed class ContainerServiceProvider(ContainerService.ContainerServiceClient service, ClientContext clientCtx) : ContextAccessor(clientCtx)
 {
     private SessionProvider? sessions;
 
-    public async ValueTask<SessionToken> GetOrCreateSession(ISessionToken args, CallContext ctx)
+    public async ValueTask<FrostFsSessionToken> GetDefaultSession(ISessionToken args, CallContext ctx)
     {
         sessions ??= new(ClientContext);
 
-        if (ClientContext.SessionCache.Cache != null &&
-            ClientContext.SessionCache.Cache.ContainsKey(ClientContext.SessionCacheKey))
+        if (!ClientContext.SessionCache!.TryGetValue(ClientContext.SessionCacheKey, out var token))
         {
-            return (SessionToken)ClientContext.SessionCache.Cache[ClientContext.SessionCacheKey];
+            var protoToken = await sessions.GetDefaultSession(args, ctx).ConfigureAwait(false);
+
+            token = new FrostFsSessionToken(protoToken);
+
+            ClientContext.SessionCache.SetValue(ClientContext.SessionCacheKey, token);
         }
 
-        return await sessions.GetOrCreateSession(args, ctx).ConfigureAwait(false);
+        if (token == null)
+        {
+            throw new FrostFsException("Cannot create session");
+        }
+
+        return token;
     }
 
     internal async Task<FrostFsContainerInfo> GetContainerAsync(PrmContainerGet args)
     {
-        GetRequest request = GetContainerRequest(args.Container.ContainerID, args.XHeaders, args.Context);
+        GetRequest request = GetContainerRequest(args.Container.ContainerID, args.XHeaders, ClientContext.Key.ECDsaKey);
 
         var response = await service.GetAsync(request, null, args.Context.Deadline, args.Context.CancellationToken);
 
@@ -43,24 +52,17 @@ internal sealed class ContainerServiceProvider(ContainerService.ContainerService
     internal async IAsyncEnumerable<FrostFsContainerId> ListContainersAsync(PrmContainerGetAll args)
     {
         var ctx = args.Context!;
-        ctx.OwnerId ??= ClientContext.Owner;
-        ctx.Key ??= ClientContext.Key?.ECDsaKey;
-
-        if (ctx.Key == null)
-            throw new ArgumentNullException(nameof(args), "Key is null");
-        if (ctx.OwnerId == null)
-            throw new ArgumentException(nameof(ctx.OwnerId));
 
         var request = new ListRequest
         {
             Body = new()
             {
-                OwnerId = ctx.OwnerId.ToMessage()
+                OwnerId = ClientContext.Owner.OwnerID
             }
         };
 
         request.AddMetaHeader(args.XHeaders);
-        request.Sign(ctx.Key);
+        request.Sign(ClientContext.Key.ECDsaKey);
 
         var response = await service.ListAsync(request, null, ctx.Deadline, ctx.CancellationToken);
 
@@ -68,7 +70,7 @@ internal sealed class ContainerServiceProvider(ContainerService.ContainerService
 
         foreach (var cid in response.Body.ContainerIds)
         {
-            yield return new FrostFsContainerId(Base58.Encode(cid.Value.ToByteArray()));
+            yield return new FrostFsContainerId(Base58.Encode(cid.Value.Span));
         }
     }
 
@@ -78,36 +80,28 @@ internal sealed class ContainerServiceProvider(ContainerService.ContainerService
 
         var grpcContainer = args.Container.GetContainer();
 
-        grpcContainer.OwnerId ??= ctx.OwnerId?.ToMessage();
-        grpcContainer.Version ??= ctx.Version?.ToMessage();
-
-        if (ctx.Key == null)
-            throw new ArgumentNullException(nameof(args), "Key is null");
-        if (grpcContainer.OwnerId == null)
-            throw new ArgumentException(nameof(grpcContainer.OwnerId));
-        if (grpcContainer.Version == null)
-            throw new ArgumentException(nameof(grpcContainer.Version));
+        grpcContainer.OwnerId ??= ClientContext.Owner.OwnerID;
+        grpcContainer.Version ??= ClientContext.Version.VersionID;
 
         var request = new PutRequest
         {
             Body = new PutRequest.Types.Body
             {
                 Container = grpcContainer,
-                Signature = ctx.Key.SignRFC6979(grpcContainer)
+                Signature = ClientContext.Key.ECDsaKey.SignRFC6979(grpcContainer)
             }
         };
 
-        var sessionToken = await GetOrCreateSession(args, ctx).ConfigureAwait(false);
+        var sessionToken = (args.SessionToken ?? await GetDefaultSession(args, ctx).ConfigureAwait(false)) ?? throw new FrostFsException("Cannot create session token");
 
-        sessionToken.CreateContainerTokenContext(
+        var protoToken = sessionToken.CreateContainerToken(
             null,
             ContainerSessionContext.Types.Verb.Put,
-            ctx.Key,
-            ctx.GetPublicKeyCache()!);
+            ClientContext.Key);
 
-        request.AddMetaHeader(args.XHeaders, sessionToken);
+        request.AddMetaHeader(args.XHeaders, protoToken);
 
-        request.Sign(ctx.Key);
+        request.Sign(ClientContext.Key.ECDsaKey);
 
         var response = await service.PutAsync(request, null, ctx.Deadline, ctx.CancellationToken);
 
@@ -121,29 +115,26 @@ internal sealed class ContainerServiceProvider(ContainerService.ContainerService
     internal async Task DeleteContainerAsync(PrmContainerDelete args)
     {
         var ctx = args.Context!;
-        if (ctx.Key == null)
-            throw new ArgumentNullException(nameof(args), "Key is null");
 
         var request = new DeleteRequest
         {
             Body = new DeleteRequest.Types.Body
             {
                 ContainerId = args.ContainerId.ToMessage(),
-                Signature = ctx.Key.SignRFC6979(args.ContainerId.ToMessage().Value)
+                Signature = ClientContext.Key.ECDsaKey.SignRFC6979(args.ContainerId.ToMessage().Value)
             }
         };
 
-        var sessionToken = await GetOrCreateSession(args, ctx).ConfigureAwait(false);
+        var sessionToken = args.SessionToken ?? await GetDefaultSession(args, ctx).ConfigureAwait(false);
 
-        sessionToken.CreateContainerTokenContext(
+        var protoToken = sessionToken.CreateContainerToken(
             request.Body.ContainerId,
             ContainerSessionContext.Types.Verb.Delete,
-            ctx.Key,
-            ctx.GetPublicKeyCache()!);
+            ClientContext.Key);
 
-        request.AddMetaHeader(args.XHeaders, sessionToken);
+        request.AddMetaHeader(args.XHeaders, protoToken);
 
-        request.Sign(ctx.Key);
+        request.Sign(ClientContext.Key.ECDsaKey);
 
         var response = await service.DeleteAsync(request, null, ctx.Deadline, ctx.CancellationToken);
 
@@ -155,11 +146,8 @@ internal sealed class ContainerServiceProvider(ContainerService.ContainerService
         Verifier.CheckResponse(response);
     }
 
-    private static GetRequest GetContainerRequest(ContainerID id, NameValueCollection? xHeaders, CallContext ctx)
+    private static GetRequest GetContainerRequest(ContainerID id, NameValueCollection? xHeaders, ECDsa key)
     {
-        if (ctx.Key == null)
-            throw new ArgumentNullException(nameof(ctx), "Key is null");
-
         var request = new GetRequest
         {
             Body = new GetRequest.Types.Body
@@ -169,7 +157,7 @@ internal sealed class ContainerServiceProvider(ContainerService.ContainerService
         };
 
         request.AddMetaHeader(xHeaders);
-        request.Sign(ctx.Key);
+        request.Sign(key);
 
         return request;
     }
@@ -182,7 +170,7 @@ internal sealed class ContainerServiceProvider(ContainerService.ContainerService
 
     private async Task WaitForContainer(WaitExpects expect, ContainerID id, PrmWait? waitParams, CallContext ctx)
     {
-        var request = GetContainerRequest(id, null, ctx);
+        var request = GetContainerRequest(id, null, ClientContext.Key.ECDsaKey);
 
         async Task action()
         {

src/FrostFS.SDK.Client/Services/NetmapServiceProvider.cs

@@ -1,6 +1,4 @@
 using System;
-using System.Linq;
-using System.Text;
 using System.Threading.Tasks;
 
 using FrostFS.Netmap;
@@ -47,10 +45,6 @@ internal sealed class NetmapServiceProvider : ContextAccessor
     internal async Task<FrostFsNodeInfo> GetLocalNodeInfoAsync(PrmNodeInfo args)
     {
         var ctx = args.Context!;
-        ctx.Key ??= ClientContext.Key?.ECDsaKey;
-
-        if (ctx.Key == null)
-            throw new ArgumentNullException(nameof(args), "Key is null");
 
         var request = new LocalNodeInfoRequest
         {
@@ -58,7 +52,7 @@ internal sealed class NetmapServiceProvider : ContextAccessor
         };
 
         request.AddMetaHeader(args.XHeaders);
-        request.Sign(ctx.Key);
+        request.Sign(ClientContext.Key.ECDsaKey);
 
         var response = await netmapServiceClient.LocalNodeInfoAsync(request, null, ctx.Deadline, ctx.CancellationToken);
 
@@ -69,15 +63,10 @@ internal sealed class NetmapServiceProvider : ContextAccessor
 
     internal async Task<NetworkInfoResponse> GetNetworkInfoAsync(CallContext ctx)
     {
-        ctx.Key ??= ClientContext.Key?.ECDsaKey;
-
-        if (ctx.Key == null)
-            throw new ArgumentNullException(nameof(ctx), "Key is null");
-
         var request = new NetworkInfoRequest();
 
         request.AddMetaHeader(null);
-        request.Sign(ctx.Key);
+        request.Sign(ClientContext.Key.ECDsaKey);
 
         var response = await netmapServiceClient.NetworkInfoAsync(request, null, ctx.Deadline, ctx.CancellationToken)
             .ConfigureAwait(false);
@@ -90,15 +79,11 @@ internal sealed class NetmapServiceProvider : ContextAccessor
     internal async Task<FrostFsNetmapSnapshot> GetNetmapSnapshotAsync(PrmNetmapSnapshot args)
     {
         var ctx = args.Context!;
-        ctx.Key ??= ClientContext.Key?.ECDsaKey;
-
-        if (ctx.Key == null)
-            throw new ArgumentNullException(nameof(args), "Key is null");
 
         var request = new NetmapSnapshotRequest();
 
         request.AddMetaHeader(args.XHeaders);
-        request.Sign(ctx.Key);
+        request.Sign(ClientContext.Key.ECDsaKey);
 
         var response = await netmapServiceClient.NetmapSnapshotAsync(request, null, ctx.Deadline, ctx.CancellationToken);
 
@@ -107,12 +92,16 @@ internal sealed class NetmapServiceProvider : ContextAccessor
         return response.ToModel();
     }
 
-    private static bool GetBoolValue(byte[] bytes)
+    private static bool GetBoolValue(ReadOnlySpan<byte> bytes)
     {
-        return bytes.Any(b => b != 0);
+        for (int i = bytes.Length - 1; i >= 0; i--)
+            if (bytes[i] != 0)
+                return true;
+
+        return false;
     }
 
-    private static ulong GetLongValue(byte[] bytes)
+    private static ulong GetLongValue(ReadOnlySpan<byte> bytes)
     {
         ulong val = 0;
         for (var i = bytes.Length - 1; i >= 0; i--)
@@ -123,24 +112,50 @@ internal sealed class NetmapServiceProvider : ContextAccessor
 
     private static void SetNetworksParam(Parameter param, NetworkSettings settings)
     {
-        var key = Encoding.UTF8.GetString(param.Key.ToByteArray());
+        var key = param.Key.ToStringUtf8();
 
-        var valueBytes = param.Value.ToByteArray();
+        var valueBytes = param.Value.Span;
         switch (key)
         {
-            case "AuditFee": settings.AuditFee = GetLongValue(valueBytes); break;
-            case "BasicIncomeRate": settings.BasicIncomeRate = GetLongValue(valueBytes); break;
-            case "ContainerFee": settings.ContainerFee = GetLongValue(valueBytes); break;
-            case "ContainerAliasFee": settings.ContainerAliasFee = GetLongValue(valueBytes); break;
-            case "EpochDuration": settings.EpochDuration = GetLongValue(valueBytes); break;
-            case "InnerRingCandidateFee": settings.InnerRingCandidateFee = GetLongValue(valueBytes); break;
-            case "MaxECDataCount": settings.MaxECDataCount = GetLongValue(valueBytes); break;
-            case "MaxECParityCount": settings.MaxECParityCount = GetLongValue(valueBytes); break;
-            case "MaxObjectSize": settings.MaxObjectSize = GetLongValue(valueBytes); break;
-            case "WithdrawFee": settings.WithdrawFee = GetLongValue(valueBytes); break;
-            case "HomomorphicHashingDisabled": settings.HomomorphicHashingDisabled = GetBoolValue(valueBytes); break;
-            case "MaintenanceModeAllowed": settings.MaintenanceModeAllowed = GetBoolValue(valueBytes); break;
-            default: settings.UnnamedSettings.Add(key, valueBytes); break;
+            case "AuditFee":
+                settings.AuditFee = GetLongValue(valueBytes);
+                break;
+            case "BasicIncomeRate":
+                settings.BasicIncomeRate = GetLongValue(valueBytes);
+                break;
+            case "ContainerFee":
+                settings.ContainerFee = GetLongValue(valueBytes);
+                break;
+            case "ContainerAliasFee":
+                settings.ContainerAliasFee = GetLongValue(valueBytes);
+                break;
+            case "EpochDuration":
+                settings.EpochDuration = GetLongValue(valueBytes);
+                break;
+            case "InnerRingCandidateFee":
+                settings.InnerRingCandidateFee = GetLongValue(valueBytes);
+                break;
+            case "MaxECDataCount":
+                settings.MaxECDataCount = GetLongValue(valueBytes);
+                break;
+            case "MaxECParityCount":
+                settings.MaxECParityCount = GetLongValue(valueBytes);
+                break;
+            case "MaxObjectSize":
+                settings.MaxObjectSize = GetLongValue(valueBytes);
+                break;
+            case "WithdrawFee":
+                settings.WithdrawFee = GetLongValue(valueBytes);
+                break;
+            case "HomomorphicHashingDisabled":
+                settings.HomomorphicHashingDisabled = GetBoolValue(valueBytes);
+                break;
+            case "MaintenanceModeAllowed":
+                settings.MaintenanceModeAllowed = GetBoolValue(valueBytes);
+                break;
+            default:
+                settings.UnnamedSettings.Add(key, valueBytes.ToArray());
+                break;
         }
     }
 }

src/FrostFS.SDK.Client/Services/ObjectServiceProvider.cs

@@ -17,31 +17,35 @@ using Google.Protobuf;
 namespace FrostFS.SDK.Client;
 
 internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient client, ClientContext clientCtx)
-    : ContextAccessor(clientCtx), ISessionProvider
+    : ContextAccessor(clientCtx)
 {
     private SessionProvider? sessions;
     private readonly ObjectService.ObjectServiceClient client = client;
 
-    public async ValueTask<SessionToken> GetOrCreateSession(ISessionToken args, CallContext ctx)
+    public async ValueTask<FrostFsSessionToken> GetDefaultSession(ISessionToken args, CallContext ctx)
     {
         sessions ??= new(ClientContext);
 
-        if (ClientContext.SessionCache.Cache != null &&
-            ClientContext.SessionCache.Cache.ContainsKey(ClientContext.SessionCacheKey))
+        if (!ClientContext.SessionCache!.TryGetValue(ClientContext.SessionCacheKey, out var token))
         {
-            return (SessionToken)ClientContext.SessionCache.Cache[ClientContext.SessionCacheKey];
+            var protoToken = await sessions.GetDefaultSession(args, ctx).ConfigureAwait(false);
+
+            token = new FrostFsSessionToken(protoToken);
+
+            ClientContext.SessionCache.SetValue(ClientContext.SessionCacheKey, token);
         }
 
-        return await sessions.GetOrCreateSession(args, ctx).ConfigureAwait(false);
+        if (token == null)
+        {
+            throw new FrostFsException("Cannot create session");
+        }
+
+        return token;
     }
 
     internal async Task<FrostFsObjectHeader> GetObjectHeadAsync(PrmObjectHeadGet args)
     {
         var ctx = args.Context!;
-        ctx.Key ??= ClientContext.Key?.ECDsaKey;
-
-        if (ctx.Key == null)
-            throw new ArgumentNullException(nameof(args), "Key is null");
 
         var request = new HeadRequest
         {
@@ -55,16 +59,16 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
             }
         };
 
-        var sessionToken = await GetOrCreateSession(args, ctx).ConfigureAwait(false);
+        var sessionToken = args.SessionToken ?? await GetDefaultSession(args, ctx).ConfigureAwait(false);
 
-        sessionToken.CreateObjectTokenContext(
+        var protoToken = sessionToken.CreateObjectTokenContext(
             request.Body.Address,
             ObjectSessionContext.Types.Verb.Head,
-            ctx.Key);
+            ClientContext.Key);
 
-        request.AddMetaHeader(args.XHeaders, sessionToken);
+        request.AddMetaHeader(args.XHeaders, protoToken);
 
-        request.Sign(ctx.Key);
+        request.Sign(ClientContext.Key.ECDsaKey);
 
         var response = await client!.HeadAsync(request, null, ctx.Deadline, ctx.CancellationToken).ConfigureAwait(false);
 
@@ -77,11 +81,6 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
     {
         var ctx = args.Context!;
 
-        ctx.Key ??= ClientContext.Key?.ECDsaKey;
-
-        if (ctx.Key == null)
-            throw new ArgumentNullException(nameof(args), "Key is null");
-
         var request = new GetRequest
         {
             Body = new GetRequest.Types.Body
@@ -94,16 +93,16 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
             }
         };
 
-        var sessionToken = await GetOrCreateSession(args, ctx).ConfigureAwait(false);
+        var sessionToken = args.SessionToken ?? await GetDefaultSession(args, ctx).ConfigureAwait(false);
 
-        sessionToken.CreateObjectTokenContext(
+        var protoToken = sessionToken.CreateObjectTokenContext(
             request.Body.Address,
             ObjectSessionContext.Types.Verb.Get,
-            ctx.Key);
+            ClientContext.Key);
 
-        request.AddMetaHeader(args.XHeaders, sessionToken);
+        request.AddMetaHeader(args.XHeaders, protoToken);
 
-        request.Sign(ctx.Key);
+        request.Sign(ClientContext.Key.ECDsaKey);
 
         return await GetObject(request, ctx).ConfigureAwait(false);
     }
@@ -112,11 +111,6 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
     {
         var ctx = args.Context!;
 
-        ctx.Key ??= ClientContext.Key?.ECDsaKey;
-
-        if (ctx.Key == null)
-            throw new ArgumentNullException(nameof(args), "Key is null");
-
         var request = new GetRangeRequest
         {
             Body = new GetRangeRequest.Types.Body
@@ -135,16 +129,16 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
             }
         };
 
-        var sessionToken = await GetOrCreateSession(args, ctx).ConfigureAwait(false);
+        var sessionToken = args.SessionToken ?? await GetDefaultSession(args, ctx).ConfigureAwait(false);
 
-        sessionToken.CreateObjectTokenContext(
+        var protoToken = sessionToken.CreateObjectTokenContext(
             request.Body.Address,
             ObjectSessionContext.Types.Verb.Range,
-            ctx.Key);
+            ClientContext.Key);
 
-        request.AddMetaHeader(args.XHeaders, sessionToken);
+        request.AddMetaHeader(args.XHeaders, protoToken);
 
-        request.Sign(ctx.Key);
+        request.Sign(ClientContext.Key.ECDsaKey);
 
         var call = client.GetRange(request, null, ctx.Deadline, ctx.CancellationToken);
         return new RangeReader(call);
@@ -154,11 +148,6 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
     {
         var ctx = args.Context!;
 
-        ctx.Key ??= ClientContext.Key?.ECDsaKey;
-
-        if (ctx.Key == null)
-            throw new ArgumentNullException(nameof(args), "Key is null");
-
         var request = new GetRangeHashRequest
         {
             Body = new GetRangeHashRequest.Types.Body
@@ -182,16 +171,16 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
             });
         }
 
-        var sessionToken = await GetOrCreateSession(args, ctx).ConfigureAwait(false);
+        var sessionToken = args.SessionToken ?? await GetDefaultSession(args, ctx).ConfigureAwait(false);
 
-        sessionToken.CreateObjectTokenContext(
+        var protoToken = sessionToken.CreateObjectTokenContext(
             request.Body.Address,
             ObjectSessionContext.Types.Verb.Rangehash,
-            ctx.Key);
+            ClientContext.Key);
 
-        request.AddMetaHeader(args.XHeaders, sessionToken);
+        request.AddMetaHeader(args.XHeaders, protoToken);
 
-        request.Sign(ctx.Key);
+        request.Sign(ClientContext.Key.ECDsaKey);
 
         var response = await client.GetRangeHashAsync(request, null, ctx.Deadline, ctx.CancellationToken);
 
@@ -206,10 +195,6 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
     internal async Task DeleteObjectAsync(PrmObjectDelete args)
     {
         var ctx = args.Context!;
-        ctx.Key ??= ClientContext.Key?.ECDsaKey;
-
-        if (ctx.Key == null)
-            throw new ArgumentNullException(nameof(args), "Key is null");
 
         var request = new DeleteRequest
         {
@@ -223,15 +208,15 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
             }
         };
 
-        var sessionToken = await GetOrCreateSession(args, ctx).ConfigureAwait(false);
+        var sessionToken = args.SessionToken ?? await GetDefaultSession(args, ctx).ConfigureAwait(false);
 
-        sessionToken.CreateObjectTokenContext(
+        var protoToken = sessionToken.CreateObjectTokenContext(
             request.Body.Address,
             ObjectSessionContext.Types.Verb.Delete,
-            ctx.Key);
+            ClientContext.Key);
 
-        request.AddMetaHeader(args.XHeaders, sessionToken);
-        request.Sign(ctx.Key);
+        request.AddMetaHeader(args.XHeaders, protoToken);
+        request.Sign(ClientContext.Key.ECDsaKey);
 
         var response = await client.DeleteAsync(request, null, ctx.Deadline, ctx.CancellationToken);
 
@@ -242,9 +227,6 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
     {
         var ctx = args.Context!;
 
-        if (ctx.Key == null)
-            throw new ArgumentNullException(nameof(args), "Key is null");
-
         var request = new SearchRequest
         {
             Body = new SearchRequest.Types.Body
@@ -256,22 +238,30 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
 
         request.Body.Filters.AddRange(args.Filters.Select(f => f.ToMessage()));
 
-        var sessionToken = await GetOrCreateSession(args, ctx).ConfigureAwait(false);
+        var sessionToken = args.SessionToken ?? await GetDefaultSession(args, ctx).ConfigureAwait(false);
 
-        sessionToken.CreateObjectTokenContext(
+        var protoToken = sessionToken.CreateObjectTokenContext(
             new Address { ContainerId = request.Body.ContainerId },
             ObjectSessionContext.Types.Verb.Search,
-            ctx.Key);
+            ClientContext.Key);
 
-        request.AddMetaHeader(args.XHeaders, sessionToken);
+        request.AddMetaHeader(args.XHeaders, protoToken);
 
-        request.Sign(ctx.Key);
+        request.Sign(ClientContext.Key.ECDsaKey);
 
-        var objectsIds = SearchObjects(request, ctx);
+        using var stream = GetSearchReader(request, ctx);
 
-        await foreach (var oid in objectsIds)
+        while (true)
         {
-            yield return FrostFsObjectId.FromHash(oid.Value.ToByteArray());
+            var ids = await stream.Read(ctx.CancellationToken).ConfigureAwait(false);
+
+            if (ids == null)
+                yield break;
+
+            foreach (var oid in ids)
+            {
+                yield return FrostFsObjectId.FromHash(oid.Value.Span);
+            }
         }
     }
 
@@ -296,6 +286,8 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
                 args.FullLength = args.Header.PayloadLength;
             else if (args.Payload.CanSeek)
                 args.FullLength = (ulong)args.Payload.Length;
+            else
+                throw new ArgumentException("The stream does not have a length and payload length is not defined");
 
             var response = await PutStreamObject(args).ConfigureAwait(false);
 
@@ -307,39 +299,34 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
     {
         var ctx = args.Context!;
 
-        if (ctx.Key == null)
-            throw new ArgumentNullException(nameof(args), "Key is null");
-
-        var grpcObject = ObjectTools.CreateObject(args.FrostFsObject, ctx);
+        var grpcObject = ObjectTools.CreateObject(args.FrostFsObject, ClientContext);
 
         var request = new PutSingleRequest
         {
             Body = new() { Object = grpcObject }
         };
 
-        var sessionToken = await GetOrCreateSession(args, ctx).ConfigureAwait(false);
+        var sessionToken = args.SessionToken ?? await GetDefaultSession(args, ctx).ConfigureAwait(false);
 
-        sessionToken.CreateObjectTokenContext(
+        var protoToken = sessionToken.CreateObjectTokenContext(
             new Address { ContainerId = grpcObject.Header.ContainerId, ObjectId = grpcObject.ObjectId },
             ObjectSessionContext.Types.Verb.Put,
-            ctx.Key);
+            ClientContext.Key);
 
-        request.AddMetaHeader(args.XHeaders, sessionToken);
+        request.AddMetaHeader(args.XHeaders, protoToken);
 
-        request.Sign(ctx.Key);
+        request.Sign(ClientContext.Key.ECDsaKey);
 
         var response = await client.PutSingleAsync(request, null, ctx.Deadline, ctx.CancellationToken).ConfigureAwait(false);
 
         Verifier.CheckResponse(response);
 
-        return FrostFsObjectId.FromHash(grpcObject.ObjectId.Value.ToByteArray());
+        return FrostFsObjectId.FromHash(grpcObject.ObjectId.Value.Span);
     }
 
     internal async Task<FrostFsObjectId> PatchObjectAsync(PrmObjectPatch args)
     {
         var ctx = args.Context!;
-        if (ctx.Key == null)
-            throw new ArgumentNullException(nameof(args), "Key is null");
 
         var chunkSize = args.MaxPayloadPatchChunkLength;
         Stream payload = args.Payload ?? throw new ArgumentNullException(nameof(args), "Stream parameter is null");
@@ -350,7 +337,7 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
         try
         {
             // common 
-            chunkBuffer = ClientContext.GetArrayPool(Constants.ObjectChunkSize).Rent(chunkSize);
+            chunkBuffer = ArrayPool<byte>.Shared.Rent(chunkSize);
 
             var address = new Address
             {
@@ -358,13 +345,12 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
                 ContainerId = args.Address.ContainerId
             };
 
-            var sessionToken = await GetOrCreateSession(args, ctx).ConfigureAwait(false);
+            var sessionToken = args.SessionToken ?? await GetDefaultSession(args, ctx).ConfigureAwait(false);
 
-            sessionToken.CreateObjectTokenContext(
+            var protoToken = sessionToken.CreateObjectTokenContext(
                 address,
                 ObjectSessionContext.Types.Verb.Patch,
-                ctx.Key
-            );
+                ClientContext.Key);
 
             var request = new PatchRequest()
             {
@@ -403,9 +389,9 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
 
                 currentPos += (ulong)bytesCount;
 
-                request.AddMetaHeader(args.XHeaders, sessionToken);
+                request.AddMetaHeader(args.XHeaders, protoToken);
 
-                request.Sign(ctx.Key);
+                request.Sign(ClientContext.Key.ECDsaKey);
 
                 await call.RequestStream.WriteAsync(request).ConfigureAwait(false);
 
@@ -433,20 +419,17 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
     {
         var ctx = args.Context!;
 
-        var tokenRaw = await GetOrCreateSession(args, ctx).ConfigureAwait(false);
-        var token = new FrostFsSessionToken(tokenRaw.Serialize(), tokenRaw.Body.Id.ToUuid());
-
-        args.SessionToken = token;
+        args.SessionToken ??= await GetDefaultSession(args, ctx).ConfigureAwait(false);
 
         var payloadStream = args.Payload!;
         var header = args.Header!;
 
-        var fullLength = header.PayloadLength;
-
-        if (payloadStream.CanSeek && fullLength == 0)
-            fullLength = (ulong)payloadStream.Length;
-
-        args.FullLength = fullLength;
+        if (header.PayloadLength > 0)
+            args.FullLength = header.PayloadLength;
+        else if (payloadStream.CanSeek)
+            args.FullLength = (ulong)payloadStream.Length;
+        else
+            throw new ArgumentException("The stream does not have a length and payload length is not defined");
 
         if (args.MaxObjectSizeCache == 0)
         {
@@ -456,12 +439,12 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
             args.MaxObjectSizeCache = (int)networkSettings.MaxObjectSize;
         }
 
-        var restBytes = fullLength - args.CurrentStreamPosition;
+        var restBytes = args.FullLength - args.CurrentStreamPosition;
         var objectSize = restBytes > 0 ? (int)Math.Min((ulong)args.MaxObjectSizeCache, restBytes) : args.MaxObjectSizeCache;
 
         //define collection capacity
         var restPart = (restBytes % (ulong)objectSize) > 0 ? 1 : 0;
-        var objectsCount = fullLength > 0 ? (int)(restBytes / (ulong)objectSize) + restPart : 0;
+        var objectsCount = args.FullLength > 0 ? (int)(restBytes / (ulong)objectSize) + restPart : 0;
 
         List<FrostFsObjectId> sentObjectIds = new(objectsCount);
 
@@ -491,7 +474,7 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
         {
             var largeObjectHeader = new FrostFsObjectHeader(header.ContainerId, FrostFsObjectType.Regular, [.. attributes])
             {
-                PayloadLength = fullLength,
+                PayloadLength = args.FullLength,
             };
 
             args.Header.Split!.ParentHeader = largeObjectHeader;
@@ -526,8 +509,6 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
     private async Task<PutObjectResult> PutStreamObject(PrmObjectPut args)
     {
         var ctx = args.Context!;
-        if (ctx.Key == null)
-            throw new ArgumentNullException(nameof(args), "Key is null");
 
         var payload = args.Payload!;
 
@@ -542,21 +523,26 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
 
         try
         {
+            // 0 means no limit from client, so server side cut is performed
+            var objectLimitSize = args.ClientCut ? args.MaxObjectSizeCache : 0;
+
             if (args.CustomBuffer != null)
             {
+                if (args.CustomBuffer.Length < chunkSize)
+                {
+                    throw new ArgumentException($"Buffer size is too small. At least {chunkSize} required");
+                }
+
                 chunkBuffer = args.CustomBuffer;
             }
             else
             {
-                chunkBuffer = ClientContext.GetArrayPool(Constants.ObjectChunkSize).Rent(chunkSize);
+                chunkBuffer = ArrayPool<byte>.Shared.Rent(chunkSize);
                 isRentBuffer = true;
             }
 
             var sentBytes = 0;
 
-            // 0 means no limit from client, so server side cut is performed
-            var objectLimitSize = args.ClientCut ? args.MaxObjectSizeCache : 0;
-
             using var stream = await GetUploadStream(args, ctx).ConfigureAwait(false);
 
             while (objectLimitSize == 0 || sentBytes < objectLimitSize)
@@ -581,7 +567,7 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
                     }
                 };
 
-                chunkRequest.Sign(ctx.Key);
+                chunkRequest.Sign(ClientContext.Key.ECDsaKey);
 
                 await stream.Write(chunkRequest).ConfigureAwait(false);
             }
@@ -589,7 +575,7 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
             var response = await stream.Close().ConfigureAwait(false);
             Verifier.CheckResponse(response);
 
-            return new PutObjectResult(FrostFsObjectId.FromHash(response.Body.ObjectId.Value.ToByteArray()), sentBytes);
+            return new PutObjectResult(FrostFsObjectId.FromHash(response.Body.ObjectId.Value.Span), sentBytes);
         }
         finally
         {
@@ -604,17 +590,14 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
     {
         var header = args.Header!;
 
-        if (ctx.Key == null)
-            throw new ArgumentNullException(nameof(args), "Key is null");
-
-        header.OwnerId ??= ctx.OwnerId;
-        header.Version ??= ctx.Version;
+        header.OwnerId ??= ClientContext.Owner;
+        header.Version ??= ClientContext.Version;
 
         var grpcHeader = header.GetHeader();
 
         if (header.Split != null)
         {
-            ObjectTools.SetSplitValues(grpcHeader, header.Split, ctx);
+            ObjectTools.SetSplitValues(grpcHeader, header.Split, ClientContext);
         }
 
         var oid = new ObjectID { Value = grpcHeader.Sha256() };
@@ -630,17 +613,16 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
             }
         };
 
-        var sessionToken = await GetOrCreateSession(args, ctx).ConfigureAwait(false);
+        var sessionToken = (args.SessionToken ?? await GetDefaultSession(args, ctx).ConfigureAwait(false));
 
-        sessionToken.CreateObjectTokenContext(
+        var protoToken = sessionToken.CreateObjectTokenContext(
             new Address { ContainerId = grpcHeader.ContainerId, ObjectId = oid },
             ObjectSessionContext.Types.Verb.Put,
-            ctx.Key
-        );
+            ClientContext.Key);
 
-        initRequest.AddMetaHeader(args.XHeaders, sessionToken);
+        initRequest.AddMetaHeader(args.XHeaders, protoToken);
 
-        initRequest.Sign(ctx.Key);
+        initRequest.Sign(ClientContext.Key.ECDsaKey);
 
         return await PutObjectInit(initRequest, ctx).ConfigureAwait(false);
     }
@@ -681,24 +663,6 @@ internal sealed class ObjectServiceProvider(ObjectService.ObjectServiceClient cl
         return new ObjectReader(call);
     }
 
-    private async IAsyncEnumerable<ObjectID> SearchObjects(SearchRequest request, CallContext ctx)
-    {
-        using var stream = GetSearchReader(request, ctx);
-
-        while (true)
-        {
-            var ids = await stream.Read(ctx.CancellationToken).ConfigureAwait(false);
-
-            if (ids == null)
-                break;
-
-            foreach (var oid in ids)
-            {
-                yield return oid;
-            }
-        }
-    }
-
     private SearchReader GetSearchReader(SearchRequest initRequest, CallContext ctx)
     {
         if (initRequest is null)

src/FrostFS.SDK.Client/Services/SessionServiceProvider.cs

@@ -1,7 +1,5 @@
 using System.Threading.Tasks;
 
-using FrostFS.SDK.Client;
-using FrostFS.SDK.Client.Mappers.GRPC;
 using FrostFS.Session;
 
 namespace FrostFS.SDK.Client;
@@ -20,19 +18,17 @@ internal sealed class SessionServiceProvider : ContextAccessor
     {
         var ctx = args.Context!;
 
-        ctx.OwnerId ??= ClientContext.Owner;
-
         var request = new CreateRequest
         {
             Body = new CreateRequest.Types.Body
             {
-                OwnerId = ctx.OwnerId!.ToMessage(),
+                OwnerId = ClientContext.Owner.OwnerID,
                 Expiration = args.Expiration
             }
         };
 
         request.AddMetaHeader(args.XHeaders);
-        request.Sign(ctx.Key!);
+        request.Sign(ClientContext.Key.ECDsaKey);
 
         return await CreateSession(request, args.Context!).ConfigureAwait(false);
     }

src/FrostFS.SDK.Client/Services/Shared/SessionProvider.cs

@@ -9,14 +9,15 @@ internal interface ISessionProvider
 
 internal sealed class SessionProvider(ClientContext envCtx)
 {
-    public async ValueTask<Session.SessionToken> GetOrCreateSession(ISessionToken args, CallContext ctx)
+    public async Task<FrostFsSessionToken> CreateSession(ISessionToken args, CallContext ctx)
     {
-        if (args.SessionToken is null)
-        {
-            return await envCtx.Client.CreateSessionInternalAsync(new PrmSessionCreate(uint.MaxValue, ctx))
-                .ConfigureAwait(false);
-        }
+        var token = await GetDefaultSession(args, ctx).ConfigureAwait(false);
 
-        return new Session.SessionToken().Deserialize(args.SessionToken.Token);
+        return new FrostFsSessionToken(token);
+    }
+
+    internal async Task<Session.SessionToken> GetDefaultSession(ISessionToken args, CallContext ctx)
+    {
+        return await envCtx.Client.CreateSessionInternalAsync(new PrmSessionCreate(uint.MaxValue, ctx)).ConfigureAwait(false);
     }
 }

src/FrostFS.SDK.Client/Tools/ClientContext.cs

@@ -1,19 +1,16 @@
 using System;
-using System.Buffers;
-using System.Security.Cryptography;
-
-using FrostFS.SDK.Cryptography;
+using System.Collections.ObjectModel;
 
+using Grpc.Core.Interceptors;
 using Grpc.Net.Client;
 
 namespace FrostFS.SDK.Client;
 
-public class ClientContext(FrostFSClient client, ECDsa? key, FrostFsOwner? owner, GrpcChannel channel, FrostFsVersion version) : IDisposable
+public class ClientContext(FrostFSClient client, ClientKey key, FrostFsOwner owner, GrpcChannel channel, FrostFsVersion version) : IDisposable
 {
-    private ArrayPool<byte>? _arrayPool;
     private string? sessionKey;
 
-    internal FrostFsOwner? Owner { get; } = owner;
+    internal FrostFsOwner Owner { get; } = owner;
 
     internal string? Address { get; } = channel.Target;
 
@@ -25,9 +22,16 @@ public class ClientContext(FrostFSClient client, ECDsa? key, FrostFsOwner? owner
 
     internal FrostFSClient Client { get; } = client;
 
-    internal ClientKey? Key { get; } = key != null ? new ClientKey(key) : null;
+    internal ClientKey Key { get; } = key;
+
+    internal SessionCache? SessionCache { get; set; }
+
+    internal Action<CallStatistics>? Callback { get; set; }
+
+    internal Collection<Interceptor>? Interceptors { get; set; }
+
+    internal Action<Exception>? PoolErrorHandler { get; set; }
 
-    internal SessionCache SessionCache { get; set; }
 
     internal string? SessionCacheKey
     {
@@ -35,23 +39,13 @@ public class ClientContext(FrostFSClient client, ECDsa? key, FrostFsOwner? owner
         {
             if (sessionKey == null && Key != null && Address != null)
             {
-                sessionKey = Pool.FormCacheKey(Address, Key.ECDsaKey.PrivateKey().ToString());
+                sessionKey = Pool.FormCacheKey(Address, Key.PublicKey);
             }
 
             return sessionKey;
         }
     }
 
-    /// <summary>
-    /// Custom pool is used for predefined sizes of buffers like grpc chunk 
-    /// </summary>
-    internal ArrayPool<byte> GetArrayPool(int size)
-    {
-        _arrayPool ??= ArrayPool<byte>.Create(size, 256);
-
-        return _arrayPool;
-    }
-
     public void Dispose()
     {
         Dispose(true);

src/FrostFS.SDK.Client/Tools/ObjectTools.cs

@@ -11,7 +11,7 @@ namespace FrostFS.SDK.Client;
 
 internal static class ObjectTools
 {
-    internal static FrostFsObjectId CalculateObjectId(FrostFsObjectHeader header, CallContext ctx)
+    internal static FrostFsObjectId CalculateObjectId(FrostFsObjectHeader header, ClientContext ctx)
     {
         var grpcHeader = CreateHeader(header, [], ctx);
 
@@ -21,9 +21,9 @@ internal static class ObjectTools
         return new ObjectID { Value = grpcHeader.Sha256() }.ToModel();
     }
 
-    internal static Object.Object CreateObject(FrostFsObject @object, CallContext ctx)
+    internal static Object.Object CreateObject(FrostFsObject @object, ClientContext ctx)
     {
-        @object.Header.OwnerId ??= ctx.OwnerId;
+        @object.Header.OwnerId ??= ctx.Owner;
         @object.Header.Version ??= ctx.Version;
 
         var grpcHeader = @object.Header.GetHeader();
@@ -46,14 +46,14 @@ internal static class ObjectTools
 
         obj.Signature = new Signature
         {
-            Key = ctx.GetPublicKeyCache(),
-            Sign = ByteString.CopyFrom(ctx.Key!.SignData(obj.ObjectId.ToByteArray())),
+            Key = ctx.Key.PublicKeyProto,
+            Sign = ctx.Key.ECDsaKey.SignData(obj.ObjectId.ToByteArray()),
         };
 
         return obj;
     }
 
-    internal static void SetSplitValues(Header grpcHeader, FrostFsSplit split, CallContext ctx)
+    internal static void SetSplitValues(Header grpcHeader, FrostFsSplit split, ClientContext ctx)
     {
         if (split == null)
             return;
@@ -77,17 +77,17 @@ internal static class ObjectTools
             grpcHeader.Split.ParentHeader = grpcParentHeader;
             grpcHeader.Split.ParentSignature = new Signature
             {
-                Key = ctx.GetPublicKeyCache(),
-                Sign = ByteString.CopyFrom(ctx.Key.SignData(grpcHeader.Split.Parent.ToByteArray())),
+                Key = ctx.Key.PublicKeyProto,
+                Sign = ctx.Key.ECDsaKey.SignData(grpcHeader.Split.Parent.ToByteArray()),
             };
         }
 
         grpcHeader.Split.Previous = split.Previous?.ToMessage();
     }
 
-    internal static Header CreateHeader(FrostFsObjectHeader header, byte[]? payload, CallContext ctx)
+    internal static Header CreateHeader(FrostFsObjectHeader header, byte[]? payload, ClientContext ctx)
     {
-        header.OwnerId ??= ctx.OwnerId;
+        header.OwnerId ??= ctx.Owner;
         header.Version ??= ctx.Version;
 
         var grpcHeader = header.GetHeader();

src/FrostFS.SDK.Client/Tools/RequestConstructor.cs

@@ -1,11 +1,8 @@
 using System;
 using System.Collections.Specialized;
 using System.Linq;
-using System.Security.Cryptography;
 
-using FrostFS.Refs;
 using FrostFS.SDK.Client.Mappers.GRPC;
-using FrostFS.SDK.Cryptography;
 using FrostFS.SDK.Proto.Interfaces;
 using FrostFS.Session;
 
@@ -33,59 +30,4 @@ public static class RequestConstructor
                 xHeaders.Cast<string>().SelectMany(key => xHeaders.GetValues(key),
                      (k, v) => new XHeader { Key = k, Value = v }));
     }
-
-    public static void CreateObjectTokenContext(this SessionToken sessionToken,
-        Address address,
-        ObjectSessionContext.Types.Verb verb,
-        ECDsa key)
-    {
-        if (sessionToken is null)
-        {
-            throw new ArgumentNullException(nameof(sessionToken));
-        }
-
-        if (address is null)
-        {
-            throw new ArgumentNullException(nameof(address));
-        }
-
-        if (sessionToken.Body.Object?.Target != null)
-            return;
-
-        ObjectSessionContext.Types.Target target = new() { Container = address.ContainerId };
-
-        if (address.ObjectId != null)
-            target.Objects.Add(address.ObjectId);
-
-        sessionToken.Body.Object = new()
-        {
-            Target = target,
-            Verb = verb
-        };
-
-        sessionToken.Body.SessionKey = Google.Protobuf.ByteString.CopyFrom(key.PublicKey());
-
-        sessionToken.Signature = key.SignMessagePart(sessionToken.Body);
-    }
-
-    internal static void CreateContainerTokenContext(this SessionToken sessionToken,
-       ContainerID? containerId,
-       ContainerSessionContext.Types.Verb verb,
-       ECDsa key,
-       Google.Protobuf.ByteString publicKey)
-    {
-        if (sessionToken.Body.Container?.ContainerId != null)
-            return;
-
-        sessionToken.Body.Container = new() { Verb = verb };
-
-        if (containerId != null)
-            sessionToken.Body.Container.ContainerId = containerId;
-        else
-            sessionToken.Body.Container.Wildcard = true;
-
-        sessionToken.Body.SessionKey = publicKey;
-
-        sessionToken.Signature = key.SignMessagePart(sessionToken.Body);
-    }
 }

src/FrostFS.SDK.Client/Tools/RequestSigner.cs

@@ -14,24 +14,21 @@ using Org.BouncyCastle.Crypto.Parameters;
 using Org.BouncyCastle.Crypto.Signers;
 using Org.BouncyCastle.Math;
 
+using Signature = FrostFS.Refs.Signature;
+
 namespace FrostFS.SDK.Client;
 
 public static class RequestSigner
 {
     internal const int RFC6979SignatureSize = 64;
 
-    internal static byte[] SignRFC6979(this ECDsa key, byte[] data)
+    internal static ByteString SignRFC6979(this ECDsa key, byte[] data)
     {
         if (key is null)
         {
             throw new ArgumentNullException(nameof(key));
         }
 
-        if (data is null)
-        {
-            throw new ArgumentNullException(nameof(data));
-        }
-
         var digest = new Sha256Digest();
         var secp256R1 = SecNamedCurves.GetByName("secp256r1");
         var ecParameters = new ECDomainParameters(secp256R1.Curve, secp256R1.G, secp256R1.N);
@@ -44,24 +41,27 @@ public static class RequestSigner
         signer.Init(true, privateKey);
 
         var rs = signer.GenerateSignature(hash);
-        var signature = new byte[RFC6979SignatureSize];
+
+        Span<byte> signature = stackalloc byte[RFC6979SignatureSize];
+
         var rbytes = rs[0].ToByteArrayUnsigned();
         var sbytes = rs[1].ToByteArrayUnsigned();
         var index = RFC6979SignatureSize / 2 - rbytes.Length;
 
-        rbytes.CopyTo(signature, index);
+        rbytes.AsSpan().CopyTo(signature[index..]);
         index = RFC6979SignatureSize - sbytes.Length;
-        sbytes.CopyTo(signature, index);
+        sbytes.AsSpan().CopyTo(signature[index..]);
 
-        return signature;
+        return ByteString.CopyFrom(signature);
     }
 
+
     internal static SignatureRFC6979 SignRFC6979(this ECDsa key, IMessage message)
     {
         return new SignatureRFC6979
         {
             Key = ByteString.CopyFrom(key.PublicKey()),
-            Sign = ByteString.CopyFrom(key.SignRFC6979(message.ToByteArray())),
+            Sign = key.SignRFC6979(message.ToByteArray()),
         };
     }
 
@@ -70,23 +70,26 @@ public static class RequestSigner
         return new SignatureRFC6979
         {
             Key = ByteString.CopyFrom(key.PublicKey()),
-            Sign = ByteString.CopyFrom(key.SignRFC6979(data.ToByteArray())),
+            Sign = key.SignRFC6979(data.ToByteArray()),
         };
     }
 
-    public static byte[] SignData(this ECDsa key, byte[] data)
+    public static ByteString SignData(this ECDsa key, byte[] data)
     {
         if (key is null)
         {
             throw new ArgumentNullException(nameof(key));
         }
 
-        var hash = new byte[65];
-        hash[0] = 0x04;
+        Span<byte> result = stackalloc byte[65];
+        result[0] = 0x04;
 
-        key.SignHash(data.Sha512()).CopyTo(hash, 1);
+        //var hash = new byte[65];
+        //hash[0] = 0x04;
 
-        return hash;
+        key.SignHash(data.Sha512()).AsSpan().CopyTo(result[1..]);
+
+        return ByteString.CopyFrom(result);
     }
 
     internal static Signature SignMessagePart(this ECDsa key, IMessage? data)
@@ -95,7 +98,7 @@ public static class RequestSigner
         var sig = new Signature
         {
             Key = ByteString.CopyFrom(key.PublicKey()),
-            Sign = ByteString.CopyFrom(key.SignData(data2Sign)),
+            Sign = key.SignData(data2Sign),
         };
 
         return sig;

src/FrostFS.SDK.Client/Tools/SearchReader.cs

@@ -1,21 +1,21 @@
 using System;
-using System.Collections.Generic;
-using System.Linq;
 using System.Threading;
 using System.Threading.Tasks;
 
 using FrostFS.Object;
 using FrostFS.Refs;
 
+using Google.Protobuf.Collections;
+
 using Grpc.Core;
 
 namespace FrostFS.SDK.Client;
 
 internal sealed class SearchReader(AsyncServerStreamingCall<SearchResponse> call) : IDisposable
 {
-    public AsyncServerStreamingCall<SearchResponse> Call { get; private set; } = call;
+    internal AsyncServerStreamingCall<SearchResponse> Call { get; private set; } = call;
 
-    public async Task<List<ObjectID>?> Read(CancellationToken cancellationToken)
+    internal async Task<RepeatedField<ObjectID>?> Read(CancellationToken cancellationToken)
     {
         if (!await Call.ResponseStream.MoveNext(cancellationToken).ConfigureAwait(false))
             return null;
@@ -24,7 +24,7 @@ internal sealed class SearchReader(AsyncServerStreamingCall<SearchResponse> call
 
         Verifier.CheckResponse(response);
 
-        return response.Body?.IdList.ToList();
+        return response.Body?.IdList;
     }
 
     public void Dispose()

src/FrostFS.SDK.Client/Tools/Verifier.cs

@@ -88,6 +88,7 @@ public static class Verifier
         return key.VerifyData(data2Verify, sig.Sign.ToByteArray());
     }
 
+
     internal static bool VerifyMatryoskaLevel(IMessage body, IMetaHeader meta, IVerificationHeader verification)
     {
         if (!verification.MetaSignature.VerifyMessagePart(meta))